JP6940180B2 - Optical module and optical module control method - Google Patents

Description

The present invention relates to an optical module and an optical module control method, and in particular, an optical module conforming to an SFP (Small Form Factor Pluggable) standard or a DSFP (Dual Small Form Factor Pluggable) standard, and a control program mounted on the optical module. The present invention relates to an optical module control method for confirming the operation of (control software).

The optical module used for optical communication has a transmitting unit and a receiving unit. The receiving unit receives an optical signal from an external optical fiber transmission line and converts the received optical signal into an electric signal. The transmission unit converts an electric signal into an optical signal and transmits the converted optical signal to an external optical fiber transmission line. Both the transmitting unit and the receiving unit are connected to an optical control device (driver) in the optical module, and the optical control device is connected to an optical module control device (controller) in the optical module. Then, the optical module control device monitors and controls optical signals transmitted and received between the transmitting unit and the receiving unit via the optical control device.

Here, the optical module control device includes a control CPU (Central Processing Unit) in the optical module, and is equipped with a control program (control software) for monitoring and controlling the transmitting unit and the receiving unit. The optical module control device usually has a dedicated debug terminal for confirming the operation of the control program (control software), and by using the debug terminal, the operation of the control program (control software) can be operated. Normality can be confirmed. Further, the optical module control device can erase unnecessary parts of the control program (control software) and additionally write a new program to the control program by using the debug terminal.

Japanese Patent Application Laid-Open No. 2013-187714 "Optical Transceiver" of Patent Document 1, Japanese Patent Application Laid-Open No. 2018-26748 "Optical Transceiver and its Download Data Writing Method" of Patent Document 2, and Japanese Patent Application Laid-Open No. 2018-125772 of Patent Document 3. Japanese publications such as "Optical Transceiver and Firmware Writing Method for Optical Transceiver" and the like disclose a technique for writing a program to a controller inside an optical module. Here, the technique for writing a program is a technique for updating a control program.

Japanese Unexamined Patent Publication No. 2013-187714 Japanese Unexamined Patent Publication No. 2018-26748 JP-A-2018-125772

However, in the current technology described in Patent Documents 1, 2, 3 and the like related to the present invention, the normality of the control program (control software) can be confirmed even by using the debug terminal. However, when a defect (bug) occurs in the control program (control software), the location where the defect occurs cannot be easily identified. For this reason, it is not possible to easily correct the defective part of the control program (control software) to a normal state, and the control program (control software) that has been confirmed to have no defect (bug) There is a problem to be solved that it cannot be updated. Such issues will be further described below.

In the current technology, an optical module control device, which is an external device, is used to control and monitor the operation of the optical module. The optical module control device and the optical module are connected via an external terminal. This external terminal conforms to the SFP standard (Small Form Factor Pluggable) standard or the DSFP (Dual Small Form Factor Pluggable) standard. Serial communication is performed between the optical module control device and the optical module via the external terminal. In this serial communication, a serial signal conforming to the SFP standard or the DSFP standard is used. This serial signal is a serial clock signal and a serial data signal, and conforms to the SFP standard or the DSFP standard. Further, the optical module control device can connect a debug device (debugger) for checking the operation of the control program (control software) mounted on the optical module and a serial communication device for serial communication to the external terminal. It also has a function to make it.

Then, when debugging the control program (control software), the debug device (debugger) is connected to the external terminal from the optical module control device side. The debug device (debugger) monitors the communication state using the serial signal in the optical module, and confirms the operation of the optical module based on the monitored result. The operation check in the debug device (debugger) confirms the normality of the operation of the control program (control software).

However, in the current technology, for example, when serial communication between the optical module and the optical module control device becomes impossible due to factors such as a defect (bug) in the control program (control software) mounted on the optical module. , It is not possible to recognize what is happening inside the control program (control software), and it is not possible to identify the defective part of the control program (control software).

That is, the problem to be solved in the current technology is to make it possible to easily recognize the operating state of the control program (control software) mounted on the optical module from the outside.

In the current technology, the operating state of the control program (control software) mounted on the optical module cannot be easily recognized from the outside for the following reasons. The detailed operating state of the control program (control software) can be recognized by using the debug signal flowing through the dedicated debug signal line provided inside the optical module, but the debug signal can be recognized from the outside of the optical module. It is not possible to check the debug signal flowing on the line. That is, since it is not specified to arrange a dedicated debug terminal for connecting the debug signal line through which the debug signal flows as an external terminal of the optical module conforming to the SFP standard or the DSFP standard, the above-mentioned Patent Documents 1, 2 and 3 In any current technology including the above, in an optical module conforming to the SFP standard or the DSFP standard, the detailed operating state of the control program (control software) cannot be confirmed from the outside of the optical module.

Therefore, in the current technology, in order to make it possible to recognize the operating state of the debug signal from the outside, it is necessary to disassemble the optical module and draw out a dedicated debug signal line inside. However, not only a considerable amount of work is required to disassemble the optical module in order to draw out the debug signal line to the outside, but also the optical module itself may be damaged when disassembling.

(Purpose of the present invention)
An object of the present invention is to disassemble the optical module by checking the operation (debugging) of the control program (control software) mounted on the optical module conforming to the SFP standard or the DSFP standard in view of such a problem in the current technology. It is an object of the present invention to provide an optical module and an optical module control method that can be easily performed without modifying the external terminal of the optical module.

In order to solve the above-mentioned problems, the optical module and the optical module control method according to the present invention mainly adopt the following characteristic configurations.

(1) The optical module according to the present invention is
It has a control program that controls and monitors the transmission / reception operation of serial signals transmitted / received as optical signals to and from external devices via an optical fiber transmission line, and also has an SFP (Small Form Factor Pluggable) standard or DSFP (Small Form Factor Pluggable). Dual Small Form Factor Pluggable) An optical module that complies with the standard.
As the operation mode, in addition to the normal mode for controlling and monitoring the transmission / reception operation of the optical serial signal, there is a debug mode for confirming the operation of the control program and performing debugging.
And,
It is connected to an optical module control device that controls the operation of the self-luminous module from the outside via each of the external terminals conforming to the SFP standard or the DSFP standard, and is connected to GND (ground) among the external terminals1. Alternatively, the GND terminal of any one of the plurality of GND terminals is used as an operation switching terminal for switching the operation mode, and the signal line of the operation switching signal is connected to the operation switching terminal.
And,
Whether to switch the operation mode from the normal mode to the debug mode based on the result of monitoring the signal level of the signal line of the operation switching signal set by the control via the operation switching terminal of the optical module control device. Decide whether or not
It is characterized by that.

(2) The optical module control method according to the present invention is
It has a control program that controls and monitors the transmission / reception operation of serial signals transmitted / received as optical signals to and from external devices via an optical fiber transmission line, and has an SFP (Small Form Factor Pluggable) standard or DSFP (Small Form Factor Pluggable). Dual Small Form Factor Pluggable) An optical module control method that controls the operation of an optical module that complies with the standard.
As the operation mode, in addition to the normal mode for controlling and monitoring the transmission / reception operation of the optical serial signal, there is a debug mode for confirming the operation of the control program and performing debugging.
And,
It is connected to an optical module control device that controls the operation of the self-luminous module from the outside via each of the external terminals conforming to the SFP standard or the DSFP standard, and is connected to GND (ground) among the external terminals1. Alternatively, the GND terminal of any one of the plurality of GND terminals is used as an operation switching terminal for switching the operation mode, and the signal line of the operation switching signal is connected to the operation switching terminal.
And,
Whether to switch the operation mode from the normal mode to the debug mode based on the result of monitoring the signal level of the signal line of the operation switching signal set by the control via the operation switching terminal of the optical module control device. Decide whether or not
It is characterized by that.

According to the optical module and the optical module control method of the present invention, the following effects can be mainly obtained.

According to the present invention, in an optical module conforming to an SFP standard or a DSFP standard, it is possible to easily confirm the operation of a control program (control software) installed in the optical module, and the control program (control software). It is possible to update the defective part of. Therefore, it is possible to operate the optical module using a control program that has been confirmed to have no defects (bugs).

It is a block block diagram which shows an example of the basic internal structure of the optical module which concerns on 1st Embodiment of this invention. It is a block block diagram for demonstrating an example of the operation in the debug mode of the optical module shown in FIG. 1 as an example of 1st Embodiment. It is a block block diagram for demonstrating an example of the operation of the optical module shown in FIG. 1 as an example of 1st Embodiment in a normal mode. It is a block block diagram which shows an example of the basic internal structure of the optical module which concerns on 2nd Embodiment of this invention. It is a block block diagram which shows an example of the basic internal structure of the optical module which concerns on 3rd Embodiment of this invention.

Hereinafter, preferred embodiments of the optical module and the optical module control method according to the present invention will be described with reference to the accompanying drawings. In the following description of each drawing, the drawing reference reference numerals attached to the drawings are added to each element for convenience as an example for assisting understanding, and the present invention is intended to be limited to the illustrated embodiment. It goes without saying that it is not a thing. Further, in the description of each drawing, if possible, the same elements will be designated by the same reference numerals, and duplicate description will be omitted.

(Features of the present invention)
Prior to the description of the embodiments of the present invention, an outline of the features of the present invention will be described first. The present invention relates to an optical module conforming to an SFP (Small Form Factor Pluggable) standard or a DSFP (Dual Small Form Factor Pluggable) standard, and an optical module control device for controlling and monitoring the operation of the optical module according to the present invention. Is connected to the optical module via an external terminal compliant with the SFP standard or the DFSP standard, and is mounted as the external terminal compliant with the SFP standard or the DFSP standard in the optical module control device. The main feature is that one of the GND terminals (terminals) is used as an operation switching terminal for switching the operation mode of the optical module.

Then, the signal level of the operation switching terminal is set to the GND level (Low level) in the normal mode, and is set to a voltage level, for example, a power supply level (VCC = High level) predetermined as a switching voltage value in the debug mode. The control program (control software) in the optical module switches and sets, and switches between the serial signal in the normal mode and the debug signal in the debug mode based on the monitoring result of the signal level of the operation switching terminal, and either the SFP standard or It is also a main feature that it has a function of inputting / outputting to / from the external optical module control device via an external terminal conforming to the DSFP standard.

That is, which of the external terminals of the optical module conforming to the SFP standard or the DSFP standard, which is arranged for connecting to the optical module control device for monitoring and controlling the operation of the optical module according to the present invention, is the GND terminal. Use one of them as an operation switching terminal for switching the operation mode. Then, when the operation mode is switched from the normal mode to the debug mode by setting the signal level of the operation switching terminal to the voltage level of the switching voltage value by the control of the optical module control device, the operation mode is changed to the normal mode. Instead of the serial signals (serial clock signal and serial data signal) used, the debug signal (debug clock) input and output inside the optical module for checking the operation of the control program (control software) installed in the optical module. Signals and debug data signals) are used. Then, in the normal mode, a data terminal and a clock terminal, which are external terminals conforming to the SFP standard or the DSFP standard used for inputting / outputting the serial signal to / from an external device, are used in place of the serial signal. The optical module is mainly equipped with a function of inputting / outputting the debug signal (debug clock signal and debug data signal) to and from a debug device (debugger) connected as an external device via a data terminal and a clock terminal. It is a characteristic.

(Structure example of the first embodiment)
Next, a basic configuration example of the optical module according to the first embodiment of the present invention will be described in detail with reference to FIG. FIG. 1 is a block configuration diagram showing an example of a basic internal configuration of an optical module according to a first embodiment of the present invention. Note that FIG. 1 shows an optical module control device, which is an external device that controls and monitors not only the operation of the control program (control software) mounted on the optical module but also the operation of the entire optical module, in the SFP standard or DSFP. An example of the connection state in which the optical module is connected to the optical module using an external terminal conforming to the standard is also shown.

Here, the optical module 30 shown in FIG. 1 is connected to an optical fiber transmission line, and transmits an optical input signal 41a and an optical output signal 40a of serial signals to and from an external device via the optical fiber transmission line. Send and receive as. Further, the optical module 30 conforms to the SFP standard or the DSFP standard, and the stopcock can be inserted and removed. The optical module 30 is used in a state of being connected to an optical module control device 10 which is an external device for controlling and confirming the operation of the optical module 30 via an external terminal conforming to an SFP standard or a DSFP standard. ..

Further, as shown in FIG. 1, the optical module control device 10 has a signal input terminal 20, a signal output terminal 21, a clock terminal 22, and a data terminal as external terminals that can be connected to the optical module 30 which is an external device. 23, each terminal of the operation switching terminal 24 is provided, and each is connected to each corresponding terminal on the optical module 30 side. The signal input terminal 20, the signal output terminal 21, the clock terminal 22, the data terminal 23, and the operation switching terminal 24 all conform to the SFP standard or the DSFP standard. Further, the optical module control device 10 uses an SFP standard or a DSFP standard as a debug device (debugger) for confirming the operation of the optical module 30 for searching for a defective part of the control program (control software) mounted on the optical module 30. It is also possible to connect to a compliant clock terminal 22 and data terminal 23.

Here, the operation switching terminal 24 is any one of a plurality of GND (Ground) terminals compliant with the SFP standard or the DFSP standard, which is arbitrarily selected. Then, the operation switching terminal 24 is connected to the signal line of the operation instruction signal 24b in the optical module control device 10. In the basic configuration of FIG. 1, the signal line of the operation instruction signal 24b shows a case where it is connected to GND (Ground) of the optical module control device 10 as a normal mode.

However, as will be described later, when the debug mode for confirming the operation of the control program (control software) is set, the signal line of the operation instruction signal 24b is set to the GND level (Low level) as shown by the broken line in FIG. ) To a predetermined voltage level, for example, a power supply level (VCC = High level) as a switching voltage value in the pull-up state. In the following description, in order to simplify the description, the voltage level of the switching voltage value will be set to the power supply level (VCC = High level).

On the other hand, as shown in FIG. 1, the optical module 30 has a signal input terminal 20, a signal output terminal 21, a clock terminal 22, a data terminal 23, and an operation switching terminal 24, in addition to the optical control device 31 and the optical module control device 32. Each terminal is provided as an external terminal that can be connected to an external device, and is connected to an optical module control device 10 that is one of the external devices. That is, each of the signal input terminal 20, the signal output terminal 21, the clock terminal 22, the data terminal 23, and the operation switching terminal 24 conforms to the SFP standard or the DSFP standard, and each of them is on the optical module control device 10 side. It is connected to each corresponding terminal. The operation switching terminal 24 on the optical module 30 side is a monitoring terminal for monitoring the operation mode switching state (switching state between the normal mode and the debug mode) of the operation switching terminal 24 on the optical module control device 10 side. ..

Further, the signal line of the optical output signal 40a and the signal line of the optical input signal 41a are connected to the optical control device 31 of the optical module 30, and the signal line of the optical output signal 40a and the signal line of the optical input signal 41a face each other. It is connected to an optical fiber transmission line that is connected to an external device.

Further, the optical control device 31 of the optical module 30 is connected to the signal line of the optical input signal 20a connecting between the optical module control device 10 side and the signal input terminal 20 connected to the optical module control device 10. The signal line of the optical output signal 21a connecting between the signal output terminal 21 connected to the 10 side is connected. Further, the optical control device 31 of the optical module 30 is connected to an external device via an optical fiber transmission line and an optical module control device 32 that monitors and controls an optical signal transmitted and received as a serial signal. The signal line of the control device communication signal 42a is connected.

Next, the signal line of the serial clock signal 22a connecting between the optical module control device 10 side and the clock terminal 22 connected to the optical module control device 32 of the optical module 30 is connected, and the optical module control is also performed. The signal line of the serial data signal 23a connecting between the device 10 side and the data terminal 23 to be connected is connected. As the names of the serial clock signal 22a and the serial data signal 23a indicate, the serial clock signal 22a and the serial data signal 23a are serial signals that are sequentially transmitted one bit at a time on each signal line.

Further, the optical module control device 32 of the optical module 30 is connected to the signal line of the operation switching signal 24a connected to the operation switching terminal 24 (in other words, the monitoring terminal 24) connected to the optical module control device 10 side. Further, the signal line of the optical control device communication signal 42a connected to the optical control device 31 is connected. Further, the signal line of the debug clock signal 25a and the signal line of the debug data signal 26a are also connected to the optical module control device 32 of the optical module 30. However, since the optical module 30 is a device conforming to the SFP standard or the DFSP standard, it is not arranged as an external terminal dedicated to debugging, and is a signal of the debug clock signal 25a as shown by an “x” mark in FIG. The line and the signal line of the debug data signal 26a remain in the optical module 30 and cannot be connected to a dedicated external terminal that can be connected to an external device of the optical module 30.

Therefore, not only the clock terminal 22 but also the signal line of the debug clock signal 25a is connected to the signal line of the serial clock signal 22a. Further, regarding the signal line of the serial data signal 23a, not only the data terminal 23 but also the signal line of the debug data signal 26a is connected. Therefore, when the debug mode is set, the debug clock signal 25a and the debug data signal 26a are transmitted from the signal line of the serial clock signal 22a and the signal line of the serial data signal 23a via the clock terminal 22 and the data terminal 23. It can be set to a state of inputting / outputting to / from the optical module control device 10.

Further, a control program (control software) 32a that monitors and controls the operation of the optical module 30 is mounted inside the optical module control device 32 of the optical module 30. The control program (control software) 32a also has a function of monitoring the operation switching signal 24a at the operation switching terminal 24 (in other words, the monitoring terminal 24), and the optical module control device 10 according to the monitoring result. The functions of the serial clock signal 22a, the serial data signal 23a, the debug clock signal 25a, and the debug data signal 26a connected to the side can be enabled or disabled.

Here, the operation switching signal 24a is a signal for switching between the normal mode and the debug mode. As a result of monitoring the operation switching signal 24a, when the operation mode specified by the optical module control device 10 is the normal mode, the control program (control software) 32a enables the serial clock signal 22a and the serial data signal 23a. Set and invalidate the debug clock signal 25a and the debug data signal 26a. On the other hand, when it is detected that the operation mode specified by the optical module control device 10 has been switched from the normal mode to the debug mode as the monitoring result of the operation switching signal 24a, the control program (control software) 32a determines. The setting state of the normal mode is switched, the serial clock signal 22a and the serial data signal 23a are set to be invalid, and the debug clock signal 25a and the debug data signal 26a are set to be valid.

(Example of explaining the operation of the first embodiment)
Next, see FIG. 2 for an example of the operation of the optical module 30 shown in FIG. 1 as the first embodiment of the present invention in the debug mode (mode for confirming the operation of the control program (control software) 32a). I will explain in detail. FIG. 2 is a block configuration diagram for explaining an example of the operation of the optical module 30 shown in FIG. 1 in the debug mode as an example of the first embodiment, and is a control program (control software) of the optical module control device 32. ) In order to confirm the operation of 32a, the optical module control device 10 changes the signal line of the operation instruction signal 24b connected to the operation switching terminal 24 from the Debug level (Low level) to, for example, the power supply level (VCC = High level). An example of the operation when it is specified to switch to the debug mode by pulling up is described.

When the optical module 30 is set to the debug mode and the operation of the control program (control software) 32a mounted on the optical module control device 32 of the optical module 30 is confirmed, the optical module control device 10 uses the optical module control device 10 as described above. The signal level of the signal line of the operation instruction signal 24b connected to the operation switching terminal 24 is switched from the GND level (Low level) to, for example, the power supply level (VCC = High level).

The optical module control device 32 confirms the signal level of the signal line of the operation switching signal 24a connected to the operation switching terminal 24 for monitoring by the operation of the mounted control program (control software) 32a, and confirms the signal level of the optical module control device 32. It is detected that the signal level of the signal line of the operation instruction signal 24b on the module control device 10 side is switched from the GND level to, for example, the power supply level (VCC = High level). That is, the optical module control device 32 detects that the operation mode of the optical module 30 is instructed to be switched from the normal mode to the debug mode as the instruction content by the operation instruction signal 24b on the optical module control device 10 side.

As a result, the optical module control device 32 has "x" in FIG. 2 with respect to the signal lines connected to the clock terminal 22 and the data terminal 23 by the operation of the mounted control program (control software) 32a. As shown by the mark, the functions of the serial clock signal 22a and the serial data signal 23a are disabled, and instead, as shown by the “○” mark in FIG. 2, the debug clock signal 25a and the debug data signal 26a are used. Enable the function. That is, instead of inputting / outputting the serial clock signal 22a and the serial data signal 23a to the clock terminal 22 and the data terminal 23 on the optical module control device 10 side, the debug clock signal 25a and the debug data signal 26a are used. Is set to the input / output state.

Therefore, by connecting a debug device (debugger) for checking the operation of the control program (control software) 32a to each of the clock terminal 22 and the data terminal 23 on the optical module control device 10 side, the debug device (debugger) can be used. , It becomes possible to control and monitor the state of the debug clock signal 25a and the debug data signal 26a. As a result, the debug device (debugger) can confirm the detailed operation of the control program (control software) 32a by grasping what is happening inside the control program (control software) 32a. It becomes possible to accurately identify the defective part. That is, it is not necessary to disassemble the optical module 30 to extract the internal debug signal, and the optical module 30 is mounted on the optical module 30 without any modification of the external terminal conforming to the SFP standard or the DSFP standard of the optical module 30. It becomes possible to easily check (debug) the operation of the control program (control software) 32a.

Next, as the first embodiment of the present invention, the normal mode of the optical module 30 shown in FIG. 1 (the optical module 30 uses a normal serial signal to perform serial communication with an external device via an optical fiber transmission line). An example of the operation in the mode) will be described in detail with reference to FIG. FIG. 3 is a block configuration diagram for explaining an example of the operation of the optical module 30 shown in FIG. 1 in the normal mode as an example of the first embodiment.

Normally, the optical module 30 is set to the normal mode, and the control program (control software) 32a mounted on the optical module control device 32 of the optical module 30 transmits and receives a serial signal to and from an external device via an optical fiber transmission line. When controlling to perform serial communication, the optical module control device 10 sets the signal line of the operation instruction signal 24b connected to the operation switching terminal 24 to the GND level (Low level).

The optical module control device 32 confirms the signal level of the signal line of the operation switching signal 24a connected to the operation switching terminal 24 for monitoring by the operation of the mounted control program (control software) 32a, and confirms the signal level of the optical module control device 32. It is detected that the operation instruction signal 24b on the module control device 10 side is set to the GND level. That is, the optical module control device 32 detects that the operation mode of the optical module 30 is instructed to be set to the normal mode as the instruction content by the operation instruction signal 24b on the optical module control device 10 side.

As a result, the optical module control device 32 has "x" in FIG. 3 with respect to the signal lines connected to the clock terminal 22 and the data terminal 23 by the operation of the mounted control program (control software) 32a. As shown by the mark, the functions of the debug clock signal 25a and the debug data signal 26a are disabled, while the functions of the serial clock signal 22a and the serial data signal 23a are shown by the “○” mark in FIG. Is enabled. That is, instead of the debug clock signal 25a and the debug data signal 26a, the serial clock signal 22a and the serial data signal 23a are input and output to each of the clock terminal 22 and the data terminal 23 on the optical module control device 10 side. Set to state.

Therefore, by connecting the serial communication device to each of the clock terminal 22 and the data terminal 23 on the optical module control device 10 side, the serial communication device transfers the serial clock signal 22a and the serial data signal 23a to the optical module 30. Input / output becomes possible, and the optical module 30 operates in a normal serial communication state. Thus, the serial communication device can perform serial communication with the optical module 30 and monitor the serial communication state, so that the optical module 30 can communicate with an external device via the optical fiber transmission line. It is possible to control the operation of transmitting and receiving optical signals and monitor the transmission / reception state of optical signals.

(Structure example of the second embodiment)
Next, a basic configuration example of the optical module according to the second embodiment of the present invention will be described in detail with reference to FIG. FIG. 4 is a block configuration diagram showing an example of the basic internal configuration of the optical module according to the second embodiment of the present invention. In FIG. 4, as in the case of the block configuration diagram shown in FIG. 1 as the first embodiment, not only the operation of the control program (control software) mounted on the optical module but also the operation of the entire optical module is performed. An example of a connection state in which an optical module control device, which is an external device for controlling and monitoring, is connected to the optical module using an external terminal conforming to an SFP standard or a DSFP standard is also shown.

Here, the optical module 30A shown in FIG. 4 is connected to an optical fiber transmission line like the optical module 30 shown in FIG. 1, and the light of a serial signal is transmitted to and from an external device via the optical fiber transmission line. The input signal 41a and the optical output signal 40a are transmitted and received as optical signals. Further, the optical module 30A conforms to the SFP standard or the DSFP standard like the optical module 30 shown in FIG. 1, and the stopcock can be inserted and removed. The optical module 30A is used in a state of being connected to the optical module control device 10 which is an external device for controlling and confirming the operation of the optical module 30A via an external terminal conforming to the SFP standard or the DFSP standard. ..

The optical module control device 10 is exactly the same as the optical module control device 10 shown in FIG. 1, and includes a signal input terminal 20 and a signal output as external terminals that can be connected to the optical module 30A, which is an external device. Each of the terminals 21, the clock terminal 22, the data terminal 23, and the operation switching terminal 24 is provided, and all of them conform to the SFP standard or the DSFP standard, and are connected to the corresponding terminals on the optical module 30A side, respectively. However, in FIG. 4, the signal line of the operation instruction signal 24b is different from the setting state of the normal mode in the case of FIG. 1, and shows a setting example of the debug mode. The case where the signal line of the instruction signal 24b is switched from the GND level (Low level) to the state of pulling up to a predetermined voltage level and connected to, for example, a power supply (VCC = High level) is shown. ..

On the other hand, in the optical module 30A, similarly to the optical module 30 shown in FIG. 1, in addition to the optical control device 31 and the optical module control device 32, the signal input terminal 20, the signal output terminal 21, the clock terminal 22, the data terminal 23, Each terminal of the operation switching terminal 24 is provided as an external terminal that can be connected to an external device, and is connected to the optical module control device 10 which is one of the external devices. That is, each of the signal input terminal 20, the signal output terminal 21, the clock terminal 22, the data terminal 23, and the operation switching terminal 24 conforms to the SFP standard or the DSFP standard, and each of them is on the optical module control device 10 side. It is connected to each corresponding terminal.

Further, the optical module 30A includes the signal line of the optical output signal 40a and the signal line of the optical input signal 41a as in the optical module 30 shown in FIG. 1, and the signal line of the optical output signal 40a and the signal of the optical input signal 41a. The line is connected to an optical fiber transmission line connected to an external device facing the wire.

Further, the optical module control device 32 of the optical module 30A has a serial clock signal 22a, a serial data signal 23a, a debug clock signal 25a, and debug data, as in the case of the optical module control device 32 of the optical module 30 shown in FIG. Each signal line of the signal 26a and the optical control device communication signal 42a is connected.

However, unlike the case of the optical module 30 shown in FIG. 1, a clock signal switch 33 and a data signal switch 34 are additionally mounted in the optical module 30A. Then, with respect to each signal line of the serial clock signal 22a, the serial data signal 23a, the debug clock signal 25a, and the debug data signal 26a, the connection destinations from the optical module control device 32 are respectively connected to FIG. 1 as described below. This is different from the case of the optical module 30 shown in 1.

That is, in the optical module 30A of FIG. 4, the signal line of the serial clock signal 22a from the optical module control device 32 is connected to the first connection terminal 33A of the clock signal switch 33, and is also from the optical module control device 32. The signal line of the debug clock signal 25a is connected to the second connection terminal 33B of the clock signal switch 33, and the third connection terminal 33Y of the clock signal switch 33 is connected to the signal line of the clock signal 22b. Then, the signal line of the clock signal 22b is connected to the clock terminal 22 which is an external terminal conforming to the SFP standard or the DFSP standard, and the clock signal 22b is an external device as in the case of the optical module 30 shown in FIG. It is input and output to and from the optical module control device 10. Further, the control terminal 33S of the clock signal switch 33 is connected to the signal line of the operation switching signal 24a connected to the operation switching terminal 24 of the external terminal.

Further, in the optical module 30A of FIG. 4, the signal line of the serial data signal 23a from the optical module control device 32 is connected to the first connection terminal 34A of the data signal switch 34, and also from the optical module control device 32. The signal line of the debug data signal 26a is connected to the second connection terminal 34B of the data signal switch 34. Further, the third connection terminal 34Y of the data signal switch 34 is connected to the signal line of the data signal 23b. Then, the signal line of the data signal 23b is connected to the data terminal 23, which is an external terminal conforming to the SFP standard or the DFSP standard, and the data signal 23b is an external device as in the case of the optical module 30 shown in FIG. It is input and output to and from the optical module control device 10. Further, the control terminal 34S of the data signal switch 34 is connected to the signal line of the operation switching signal 24a connected to the operation switching terminal 24 of the external terminal.

Here, when the operation switching signal 24a specifies the operation mode of the normal mode, the control terminal 33S of the clock signal switch 33 and the control terminal 34S of the data signal switch 34 have a GND level indicating the normal mode. The Low level signal is input as a switching control signal, and the first of the clock signal switch 33 is connected to the third connection terminal 33Y of the clock signal switch 33 and the third connection terminal 34Y of the data signal switch 34, respectively. The signal line of the serial clock signal 22a connected to the connection terminal 33A and the signal line of the serial data signal 23a connected to the first connection terminal 34A of the data signal switch 34 are connected.

Therefore, the signal line of the clock signal 22b and the signal line of the data signal 23b connected to the third connection terminal 33Y of the clock signal switch 33 and the third connection terminal 34Y of the data signal switch 34 are serial, respectively. The clock signal 22a and the serial data signal 23a will be input and output. As a result, the serial clock signal 22a and the serial data signal 23a are external to the clock terminal 22 and the data terminal 23 of the external terminals to which the signal line of the clock signal 22b and the signal line of the data signal 23b are connected, respectively. It is set to a state of input / output to / from the optical module control device 10 which is a device.

On the other hand, when the operation switching signal 24a specifies the operation mode of the debug mode, the control terminal 33S of the clock signal switch 33 and the control terminal 34S of the data signal switch 34 indicate the debug mode, for example, the power supply level (High). The level) signal is input as a switching control signal, and the second connection of the clock signal switch 33 is connected to the third connection terminal 33Y of the clock signal switch 33 and the third connection terminal 34Y of the data signal switch 34, respectively. The signal line of the debug clock signal 25a connected to the terminal 33B and the signal line of the debug data signal 26a connected to the second connection terminal 34B of the data signal switch 34 are connected.

Therefore, the signal line of the clock signal 22b and the signal line of the data signal 23b connected to the third connection terminal 33Y of the clock signal switch 33 and the third connection terminal 34Y of the data signal switch 34 are respectively debugged. The clock signal 25a and the debug data signal 26a will be input and output. As a result, the debug clock signal 25a and the debug data signal 26a are external to the clock terminal 22 and the data terminal 23 of the external terminals to which the signal line of the clock signal 22b and the signal line of the data signal 23b are connected, respectively. It is set to a state of input / output to / from the optical module control device 10 which is a device.

That is, in the optical module 30A shown in FIG. 4, instead of directly connecting the signal line of the serial clock signal 22a and the signal line of the debug clock signal 25a to the clock terminal 22 connected to the optical module control device 10, the serial clock signal A clock signal switch 33 that selects either the signal line of 22a or the signal line of the debug clock signal 25a according to the signal level of the signal line of the operation switching signal 24a and connects it to the clock terminal 22, and an optical module control device. Instead of directly connecting the signal line of the serial data signal 23a and the signal line of the debug data signal 26a to the data terminal 23 connected to 10, either the signal line of the serial data signal 23a or the signal line of the debug data signal 26a. Is provided with a data signal switch 34 which is selected according to the signal level of the signal line of the operation switching signal 24a and connected to the data terminal 23.

(Example of explaining the operation of the second embodiment)
Next, as a second embodiment of the present invention, the operation of the optical module 30A shown in FIG. 4 in the debug mode (mode for confirming the operation of the control program (control software) 32a) will be described. That is, in order to confirm the operation of the control program (control software) 32a of the optical module control device 32, the optical module control device 10 sets the signal line of the operation instruction signal 24b connected to the operation switching terminal 24 to the GND level. An example of the operation when it is specified to pull up from (Low level) to, for example, the power supply level (VCC = High level) and switch to the debug mode will be described in detail with reference to FIG.

When the optical module control device 10 is instructed to pull up the signal line of the operation instruction signal 24b to, for example, a power supply level (VCC = High level) to set the operation mode of the optical module 30A to the debug mode. The signal line of the operation switching signal 24a connected to the operation switching terminal 24 on the optical module 30A side is also pulled up from the GND level (Low level) to, for example, the power supply level (VCC = High level).

As a result, the signal levels of the control terminal 33S of the clock signal switch 33 and the control terminal 34S of the data signal switch 34 to which the signal line of the operation switching signal 24a of the optical module 30A is connected are also changed from the GND level (Low level). For example, it is pulled up to the power supply level (VCC = High level). Therefore, the connection states in the clock signal switch 33 and the data signal switch 34 are switched, and the third connection terminal 33Y of the clock signal switch 33 and the third connection terminal 34Y of the data signal switch 34 are connected to each other. The state is switched from the 1 connection terminal 33A to the second connection terminal 33B, and from the first connection terminal 34A to the second connection terminal 34B.

Here, as described above, the second connection terminal 33B of the clock signal switch 33 and the second connection terminal 34B of the data signal switch 34 are the signals of the debug clock signal 25a between the optical module control device 32 and the optical module control device 32, respectively. It is connected to the signal line of the line and the debug data signal 26a. Further, the third connection terminal 33Y of the clock signal switch 33 and the third connection terminal 34Y of the data signal switch 34 are the clock terminal 22 and the data terminal, which are external terminals for external connection with the optical module control device 10, respectively. It is connected to 23.

Therefore, when the operation mode of the optical module 30A is set to the debug mode, the clock terminal 22 and the data terminal 23 for external connection with the optical module control device 10 each have a debug clock with the optical module 30A. Since the signal 25a and the debug data signal 26a are set in a state where they can be input and output, if a debug device (debugger) is connected to the clock terminal 22 and the data terminal 23, it is mounted on the optical module control device 32 of the optical module 30A. You can be confident that the control program (control software) 32a is operating.

(Structure example of the third embodiment)
Next, a basic configuration example of the optical module according to the third embodiment of the present invention will be described in detail with reference to FIG. FIG. 5 is a block configuration diagram showing an example of a basic internal configuration of an optical module according to a third embodiment of the present invention. In FIG. 5, as in the case of the block configuration diagram shown in FIG. 1 as the first embodiment, not only the operation of the control program (control software) mounted on the optical module but also the operation of the entire optical module is performed. An example of a connection state in which an optical module control device, which is an external device for controlling and monitoring, is connected to the optical module using an external terminal conforming to an SFP standard or a DSFP standard is also shown.

Here, in the third embodiment shown in FIG. 5, unlike the cases of the first and second embodiments, the operation of switching the operation mode of the optical module between the normal mode and the debug mode is performed. Instead of instructing the optical module control device 10 using the operation instruction signal connected to the operation switching terminal 24, the optical module is connected to the optical module from the clock terminal 22 which is an external terminal compliant with the SFP standard or the DFSP standard of the optical module control device 10. Based on whether or not the frequency of the clock signal input to 30B is equal to or higher than a predetermined frequency threshold value, it is instructed whether or not to switch from the normal mode to the debug mode. In other words, in the third embodiment, whether to switch from the normal mode to the debug mode based on whether or not the debug clock signal is supplied to the clock terminal 22 from the debug device (debugger) connected to the optical module control device. It shows the case of instructing whether or not.

Similar to the optical module 30 shown in FIG. 1, the optical module 30B shown in FIG. 5 is connected to an optical fiber transmission line, and the optical input signal 41a of a serial signal is connected to an external device via the optical fiber transmission line. , The optical output signal 40a is transmitted and received as an optical signal. Further, the optical module 30B conforms to the SFP standard or the DSFP standard like the optical module 30 shown in FIG. 1, and the stopcock can be inserted and removed. The optical module 30B is used in a state of being connected to the optical module control device 10 which is an external device for controlling and confirming the operation of the optical module 30B via an external terminal conforming to the SFP standard or the DFSP standard. ..

The optical module control device 10 is exactly the same as the optical module control device 10 shown in FIG. 1, and includes a signal input terminal 20 and a signal output as external terminals that can be connected to the optical module 30B, which is an external device. Each of the terminals 21, the clock terminal 22, the data terminal 23, and the operation switching terminal 24 is provided, and all of them conform to the SFP standard or the DSFP standard, and are connected to the corresponding terminals on the optical module 30A side, respectively. Further, in FIG. 5 of the third embodiment, since the signal line of the operation instruction signal 24b is not used as the signal line for switching the operation mode, the operation switching terminal 24 is set to the SFP standard or DSFP. It is used as the original GND terminal specified in the standard, and the signal line of the operation instruction signal 24b is connected to the GND (ground) as shown by the solid line in FIG.

On the other hand, in the optical module 30B, similarly to the optical module 30 shown in FIG. 1, in addition to the optical control device 31 and the optical module control device 32, the signal input terminal 20, the signal output terminal 21, the clock terminal 22, the data terminal 23, Each terminal of the operation switching terminal 24 is provided as an external terminal that can be connected to an external device, and is connected to the optical module control device 10 which is one of the external devices. That is, each of the signal input terminal 20, the signal output terminal 21, the clock terminal 22, the data terminal 23, and the operation switching terminal 24 conforms to the SFP standard or the DSFP standard, and each of them is on the optical module control device 10 side. It is connected to each corresponding terminal.

The signal line of the operation switching signal 24a connected to the operation switching terminal 24 is used for switching the operation mode, unlike the cases of FIGS. 1 and 4 described in the first embodiment and the second embodiment. As shown in FIG. 5, it is connected to the GND (ground) as the original GND terminal specified in the SFP standard or the DFSP standard.

Further, the optical module 30B includes the signal line of the optical output signal 40a and the signal line of the optical input signal 41a as in the optical module 30 shown in FIG. 1, and the signal line of the optical output signal 40a and the signal of the optical input signal 41a. The line is connected to an optical fiber transmission line connected to an external device facing the wire.

Further, the optical module control device 32 of the optical module 30B has a serial clock signal 22a, a serial data signal 23a, a debug clock signal 25a, and debug data, as in the case of the optical module control device 32 of the optical module 30 shown in FIG. Each signal line of the signal 26a and the optical control device communication signal 42a is connected.

However, unlike the case of the optical module 30 shown in FIG. 1, a low pass filter (LPF: Low Pass Filter) 35 and a high pass filter (HPF: High Pass Filter) 36 are further added to the optical module 30B. It is implemented. Then, with respect to the signal lines of the serial clock signal 22a and the debug clock signal 25a, the respective connection destinations from the optical module control device 32 are the optical modules 30 shown in FIG. 1, as described below. It's different from the case. Regarding the signal lines of the serial data signal 23a and the debug data signal 26a, both signal lines are connected to the data terminal 23 of the external terminal as in the case of the optical module 30 shown in FIG. ..

That is, the signal lines of each clock signal of the optical module 30B of FIG. 5 are connected as follows. First, the signal line of the serial clock signal 22a input to the optical module control device 32 is connected to the output terminal of the low-pass filter 35, and the input terminal of the low-pass filter 35 is externally connected to the optical module control device 10. It is connected to the signal line of the clock signal 22b connected to the clock terminal 22 which is one of the external terminals.

Further, the signal line of the debug clock signal 25a input to the optical module control device 32 is connected to the output terminal of the high-pass filter 36, and the input terminal of the high-pass filter 36 is optical like the input terminal of the low-pass filter 35. It is connected to the signal line of the clock signal 22b connected to the clock terminal 22, which is one of the external terminals externally connected to the module control device 10.

Further explanation is as follows. In the optical module 30B of FIG. 5, at least the clock signal 22b output from the optical module control device 10 to the optical module 30B via the clock terminal 22 passes through the signal line of the clock signal 22b in the optical module 30B. The signal is input to both the low-pass filter 35 and the high-pass filter 36.

When the clock signal 22b input to each filter is a low frequency clock signal adapted to the passing frequency characteristic of the low-pass filter 35, the optical module is used as the serial clock signal 22a used in the normal mode. It is output to the control device 32. On the other hand, when the clock signal 22b input to each filter is a high frequency clock signal adapted to the passing frequency characteristic of the high-pass filter 36, the optical module is used as the debug clock signal 25a used in the debug mode. It is output to the control device 32.

The frequency characteristics of the low-pass filter 35 and the high-pass filter 36 are determined based on a predetermined frequency threshold depending on the frequency of the serial clock signal 22a and the frequency of the debug clock signal 25a to be used. For example, when the frequency threshold is determined to be 1 MHz, the low-pass filter 35 is set to have a frequency characteristic for passing a clock signal having a frequency of less than 1 MHz, and the high-pass filter 36 is set to a clock signal having a frequency of 1 MHz or more. It is set to have a frequency characteristic that allows it to pass through.

Then, by using such a frequency threshold, when a serial communication device is connected to the optical module control device 10 and a clock signal less than the frequency threshold is input to the clock terminal 22, the high pass filter 36 does not pass. The clock signal is not output to the signal line of the debug clock signal 25a because it is blocked, while the low-pass filter 35 passes through and the clock signal is output to the signal line of the serial clock signal 22a. Therefore, the control program (control software) 32a of the optical module control device 32 operates in the normal mode, and the optical module 30B is in a state of performing serial communication using the serial clock signal 22a and the serial data signal 23a.

On the other hand, when a debug device (debugger) is connected to the optical module control device 10 and a clock signal equal to or higher than the frequency threshold is input to the clock terminal 22, the passage of the low pass filter 35 is blocked and the serial clock is blocked. A clock signal is not output to the signal line of the signal 22a, but on the other hand, the high-pass filter 36 passes through and a clock signal is output to the signal line of the debug clock signal 25a. Therefore, the control program (control software) 32a of the optical module control device 32 operates as a debug mode, and the optical module 30B operates using the debug clock signal 25a and the debug data signal 26a.

As described above, in the optical module 30B shown in FIG. 5, based on the monitoring result of the signal level of the signal line of the operation switching signal 24a set by the control of the optical module control device 10 as in the optical module 30 of FIG. Therefore, the operation of determining the operation mode is not performed. Instead, in the optical module 30B shown in FIG. 5, when the frequency of the clock signal 22b input from the optical module control device 10 via the clock terminal 22 is less than a predetermined frequency threshold value, The operation mode is determined as the normal mode, and when the frequency of the clock signal 22b is equal to or higher than the frequency threshold value, the operation mode is determined as the debug mode.

Then, regarding the signal line of the clock signal 22b connected to the clock terminal 22, the serial clock signal 22a passes through the low-pass filter 35 having a frequency characteristic that allows the signal line of the clock signal 22b to pass the clock signal less than the frequency threshold. The connection configuration is such that the signal line of the clock signal 22b is connected to the signal line of the debug clock signal 25a via a high-pass filter 36 having a frequency characteristic for passing the clock signal equal to or higher than the frequency threshold.

(Example of explaining the operation of the third embodiment)
Next, as a third embodiment of the present invention, the operation of the optical module 30B shown in FIG. 5 in the debug mode (mode for confirming the operation of the control program (control software) 32a) will be described. That is, in order to confirm the operation of the control program (control software) 32a of the optical module control device 32, the debug device (debugger) connected to the optical module control device 10 is connected to the clock terminal 22 and the data terminal 23. An example of the operation when the debug mode is set will be described in detail with reference to FIG.

In FIG. 5, a debug device (debugger) is connected to the clock terminal 22 and the data terminal 23 of the optical module control device 10, and a clock having a frequency equal to or higher than a frequency threshold (for example, 1 MHz) predetermined by the debug device (debugger). A signal is input to the clock terminal 22 to operate the optical module 30B. Since the clock signal having a frequency equal to or higher than the frequency threshold is a clock signal that does not pass through the low-pass filter 35 connected via the signal line of the clock signal 22b connected to the clock terminal 22, the signal line of the serial clock signal 22a is used. No clock signal is output. Therefore, the control program (control software) 32a of the optical module control device 32 does not operate as the normal mode.

On the other hand, since the clock signal having a frequency equal to or higher than the frequency threshold is a clock signal that passes through the high-pass filter 36 connected via the signal line of the clock signal 22b connected to the clock terminal 22, the signal line of the debug clock signal 25a. A clock signal is output to. Therefore, the control program (control software) 32a of the optical module control device 32 operates as a debug mode, and the debugging device (debugger) is used for debugging that is input to / from the clock terminal 22 and the data terminal 23. The operating state of the control program (control software) 32a can be confirmed based on the clock signal 25a and the debug data signal 26a.

The configuration of a preferred embodiment of the present invention has been described above. However, it should be noted that such embodiments are merely exemplary of the invention and do not limit the invention in any way. Those skilled in the art can easily understand that various modifications can be made according to a specific application without departing from the gist of the present invention.

10 Optical module controller 20 Signal input terminal 20a Optical input signal 21 Signal output terminal 21a Optical output signal 22 Clock terminal 22a Serial clock signal 22b Clock signal 23 Data terminal 23a Serial data signal 23b Data signal 24 Operation switching terminal or monitoring terminal ( GND terminal)
24a Operation switching signal 24b Operation instruction signal 25a Debug clock signal 26a Debug data signal 30 Optical module 30A Optical module 30B Optical module 31 Optical control device 32 Optical module control device 32a Control program (control software)
33 Clock signal switch 33A 1st connection terminal 33B 2nd connection terminal 33S Control terminal 33Y 3rd connection terminal 34 Data signal switch 34A 1st connection terminal 34B 2nd connection terminal 34S Control terminal 34Y 3rd connection terminal 35 Low-pass filter ( LPF: Low Pass Filter)
36 High Pass Filter (HPF)
40a Optical output signal 41a Optical input signal 42a Optical control device communication signal

Claims (6)

It has a control program that controls and monitors the transmission / reception operation of serial signals transmitted / received as optical signals to and from external devices via an optical fiber transmission line, and also has an SFP (Small Form Factor Pluggable) standard or DSFP (Small Form Factor Pluggable). Dual Small Form Factor Pluggable) An optical module that complies with the standard.
As the operation mode, in addition to the normal mode for controlling and monitoring the transmission / reception operation of the optical serial signal, there is a debug mode for confirming the operation of the control program and performing debugging.
And,
It is connected to an optical module control device that controls the operation of the self-luminous module from the outside via each of the external terminals conforming to the SFP standard or the DSFP standard, and is connected to GND (ground) among the external terminals1. Alternatively, the GND terminal of any one of the plurality of GND terminals is used as an operation switching terminal for switching the operation mode, and the signal line of the operation switching signal is connected to the operation switching terminal.
And,
Whether to switch the operation mode from the normal mode to the debug mode based on the result of monitoring the signal level of the signal line of the operation switching signal set by the control via the operation switching terminal of the optical module control device. Decide whether or not
An optical module characterized by that. The signal line of the serial clock signal used in the normal mode and the signal line of the debug clock signal used in the debug mode are connected to a clock terminal which is one of the external terminals connected to the optical module control device.
And,
The signal line of the serial data signal used in the normal mode and the signal line of the debug data signal used in the debug mode are connected to a data terminal which is one of the external terminals connected to the optical module control device, and
When the signal level of the signal line of the operation switching signal connected to the operation switching terminal is set by switching from the GND (ground) level to a voltage level predetermined as a switching voltage value under the control of the optical module control device. ,
Switching the operation mode from the normal mode to the debug mode,
The functions of the serial clock signal and the serial data signal are disabled, and the functions of the debug clock signal and the debug data signal are enabled.
again,
When the signal level of the signal line of the operation switching signal connected to the operation switching terminal is set by switching from the voltage level of the switching voltage value to the GND level under the control of the optical module control device.
Switching the operation mode from the debug mode to the normal mode,
The functions of the debug clock signal and the debug data signal are disabled, and the functions of the serial clock signal and the serial data signal are enabled.
The optical module according to claim 1. Instead of directly connecting the signal line of the serial clock signal and the signal line of the debug clock signal to the clock terminal connected to the optical module control device,
A clock signal switch that selects either the signal line of the serial clock signal or the signal line of the debug clock signal according to the signal level of the signal line of the operation switching signal and connects to the clock terminal.
Instead of directly connecting the signal line of the serial data signal and the signal line of the debug data signal to the data terminal connected to the optical module control device,
A data signal switch that selects either the signal line of the serial data signal or the signal line of the debug data signal according to the signal level of the signal line of the operation switching signal and connects to the data terminal.
The optical module according to claim 2, wherein the optical module has. It has a control program that controls and monitors the transmission / reception operation of serial signals transmitted / received as optical signals to and from external devices via an optical fiber transmission line, and has an SFP (Small Form Factor Pluggable) standard or DSFP (Small Form Factor Pluggable). Dual Small Form Factor Pluggable) An optical module control method that controls the operation of an optical module that complies with the standard.
As the operation mode, in addition to the normal mode for controlling and monitoring the transmission / reception operation of the optical serial signal, there is a debug mode for confirming the operation of the control program and performing debugging.
And,
It is connected to an optical module control device that controls the operation of the self-luminous module from the outside via each of the external terminals conforming to the SFP standard or the DSFP standard, and is connected to GND (ground) among the external terminals1. Alternatively, the GND terminal of any one of the plurality of GND terminals is used as an operation switching terminal for switching the operation mode, and the signal line of the operation switching signal is connected to the operation switching terminal.
And,
Whether to switch the operation mode from the normal mode to the debug mode based on the result of monitoring the signal level of the signal line of the operation switching signal set by the control via the operation switching terminal of the optical module control device. Decide whether or not
An optical module control method characterized by this. The signal line of the serial clock signal used in the normal mode and the signal line of the debug clock signal used in the debug mode are connected to a clock terminal which is one of the external terminals connected to the optical module control device.
And,
The signal line of the serial data signal used in the normal mode and the signal line of the debug data signal used in the debug mode are connected to a data terminal which is one of the external terminals connected to the optical module control device, and
When the signal level of the signal line of the operation switching signal connected to the operation switching terminal is set by switching from the GND (ground) level to a voltage level predetermined as a switching voltage value under the control of the optical module control device. ,
Switching the operation mode from the normal mode to the debug mode,
The functions of the serial clock signal and the serial data signal are disabled, and the functions of the debug clock signal and the debug data signal are enabled.
again,
When the signal level of the signal line of the operation switching signal connected to the operation switching terminal is set by switching from the voltage level of the switching voltage value to the GND level under the control of the optical module control device.
Switching the operation mode from the debug mode to the normal mode,
The functions of the debug clock signal and the debug data signal are disabled, and the functions of the serial clock signal and the serial data signal are enabled.
The optical module control method according to claim 4 , wherein the optical module is controlled. Instead of directly connecting the signal line of the serial clock signal and the signal line of the debug clock signal to the clock terminal connected to the optical module control device,
A clock signal switching step of selecting one of the signal line of the serial clock signal and the signal line of the debug clock signal according to the signal level of the signal line of the operation switching signal and connecting to the clock terminal.
Instead of directly connecting the signal line of the serial data signal and the signal line of the debug data signal to the data terminal connected to the optical module control device,
A data signal switching step of selecting one of the signal line of the serial data signal and the signal line of the debug data signal according to the signal level of the signal line of the operation switching signal and connecting to the data terminal.
The optical module control method according to claim 5 , wherein the optical module control method.

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