CN107241141A - A kind of driving chip, optical module, the switching method of optical module and PON equipment - Google Patents
A kind of driving chip, optical module, the switching method of optical module and PON equipment Download PDFInfo
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- CN107241141A CN107241141A CN201710532703.2A CN201710532703A CN107241141A CN 107241141 A CN107241141 A CN 107241141A CN 201710532703 A CN201710532703 A CN 201710532703A CN 107241141 A CN107241141 A CN 107241141A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/40—Transceivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/03—Arrangements for fault recovery
- H04B10/032—Arrangements for fault recovery using working and protection systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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Abstract
The invention provides a kind of driving chip, optical module, the switching method of optical module and PON equipment, driving chip is applied in optical module, and driving chip includes：Register, laser driver and limiting amplifier；The output end of register is connected with the first input end of logic sum gate, and first port, the first port of limiting amplifier of the output end of logic sum gate respectively with laser driver are connected；The first pretection switch that register output is received enables signal, and to control the burst light of laser driver to enable as failure state, the output end for controlling limiting amplifier is closed mode so that optical module is in off working state；The second protection that the register output is received enables signal, and to control the burst light of laser driver to enable as working condition, the output end for controlling the limiting amplifier is working condition so that optical module is in running order；Wherein, the register-bit of the register is pre-configured with by I2C interfaces.
Description
Technical Field
The invention belongs to the technical field of optical communication, and particularly relates to a driving chip, an optical module, a switching method of the optical module and PON equipment.
Background
Passive Optical Network (PON) technology is used as a new generation broadband access technology, has high reliability and low maintenance cost, can meet the requirements of broadband services at present and in the future, and is increasingly widely applied.
However, considering that the cost and time investment for laying and maintaining the Optical Network between the Optical Line Terminal (OLT) and the Optical Network Terminal (ONT) are high, and the current Network application environment is complex, the link failure will affect the normal experience of the user and reduce the working efficiency of the user. Therefore, the PON device needs to have a protection switching function to switch from the failed optical link to the standby optical link, so as to keep the traffic continuing normal communication.
In the prior art, the switching is generally performed by using a hardware-controlled protection switch or a software-controlled protection switch. When the protection switch is controlled by hardware to switch, the protection switch needs to be introduced, and the switching switch is switched by combining the use of a Complex Programmable Logic Device (CPLD), a Field Programmable Gate Array (FPGA) or a single chip microcomputer, and automatically detecting a preset judgment mechanism. Of course, software may be used to control the protection switch, but the protection switch must be switched automatically or manually according to a preset judgment mechanism by a detection judgment signal of a CPLD, an FPGA, a single chip, or a Central Processing Unit (CPU).
However, in the above scheme, the protection switch is expensive, and due to the use of hardware devices such as the protection switch and the CPLD, the board layout area is occupied, and the device cost is increased. Meanwhile, the devices can be supported to work only by burning a software program, the programming, debugging and verification of the program are involved, the implementation complexity is high, and the labor and time cost is increased.
Disclosure of Invention
For solving the problems existing in the prior art, embodiments of the present invention provide a driving chip, an optical module switching method, and a PON device, so as to solve the technical problem in the prior art that in a process of using the PON device for communication, when an optical link is damaged or fails to cause communication interruption, and a failed optical link needs to be switched to a standby optical link, implementation complexity is high, and cost is increased.
The invention provides a driving chip, which is applied to an optical module or a bidirectional optical component in a board, and comprises: the device comprises a register, a laser driver and a limiting amplifier; wherein,
the output end of the register is connected with the first input end of a logic OR gate, and the output end of the logic OR gate is respectively connected with the first port of the laser driver and the first port of the limiting amplifier;
the register is used for outputting a received first protection switching enable signal to control burst light enable of the laser driver to be in a failure state and control an output end of the limiting amplifier to be in a closed state, so that the optical module is in a non-working state;
the register is further configured to output a received second protection enable signal to control burst light enable of the laser driver to be in a working state, and control an output end of the limiting amplifier to be in the working state, so that the optical module is in the working state; wherein the register bits of the register are preconfigured through an Inter-Integrated Circuit (I2C) interface for connecting the microcontroller and its peripherals.
In the above scheme, the driving chip further includes: a protection switching port, configured to receive the first protection switching enable signal and the second protection switching enable signal.
In the above scheme, the protection switching port is connected to the second input terminal of the logic or gate.
In the above scheme, the driving chip includes: and the register is arranged in the storage unit, and the storage unit is connected with the I2C interface of the driving chip.
In the above solution, the first port of the laser driver includes: the burst enables the control port.
In the foregoing aspect, the first port of the limiting amplifier includes: clipping enables the control port.
In the above scheme, the protection switching enable signal is a preset digital signal.
The invention also provides an optical module, which comprises the driving chip.
The invention also provides a switching method of the optical module, wherein the optical module comprises the following steps: a driving chip; the driving chip includes: a laser driver and a limiting amplifier; the method comprises the following steps:
receiving a first protection switching enable signal;
controlling burst light enable of a laser driver to be in a failure state by using the first protection switching enable signal, and controlling an output end of the limiting amplifier to be in a closing state, so that the optical module is in a non-working state;
receiving a second protection switching enable signal;
and controlling the burst light enable of the laser driver to be in a working state by using the second protection switching enable signal, and controlling the output end of the limiting amplifier to be in a working state, so that the optical module is in a working state.
The invention also provides a passive optical network PON device, which includes a processor and an optical module, where a driving chip of the optical module includes: the device comprises a register, a laser driver and a limiting amplifier; wherein,
the output end of the register is connected with the first input end of a logic OR gate, and the output end of the logic OR gate is respectively connected with the first port of the laser driver and the first port of the limiting amplifier;
the register is used for outputting a received first protection switching enable signal to control burst light enable of the laser driver to be in a failure state and control an output end of the limiting amplifier to be in a closed state, so that the optical module is in a non-working state;
the register is further configured to output a received second protection enable signal to control burst light enable of the laser driver to be in a working state, and control an output end of the limiting amplifier to be in the working state, so that the optical module is in the working state; wherein the register bits of the register are preconfigured through a bus I2C interface for connecting the microcontroller and its peripherals.
The invention provides a driving chip, an optical module, a switching method of the optical module and PON equipment, wherein the driving chip is applied to the optical module or a bidirectional optical component in a board, and comprises the following components: the device comprises a register, a laser driver and a limiting amplifier; the output end of the register is connected with a first input end of a logic OR gate, and the output end of the logic OR gate is respectively connected with a first port of the laser driver and a first port of the limiting amplifier; the register is used for outputting a received first protection switching enable signal to control burst light enable of the laser driver to be in a failure state and control an output end of the limiting amplifier to be in a closed state, so that the optical module is in a non-working state; the register is further configured to output a received second protection enable signal to control burst light enable of the laser driver to be in a working state, and control an output end of the limiting amplifier to be in the working state, so that the optical module is in the working state; wherein the register bits of the register are preconfigured through an I2C interface; therefore, if the main optical module is in a normal working state, the standby optical module can be in a non-working state by utilizing the received first protection switching enabling signal; similarly, when an optical link from the main optical module to the opposite-end device fails, the register bit of the main optical module register is configured by using the received first protection switching enable signal, so that the main optical module is switched to a non-working state, and the register bit of the standby optical module register is restored by using the received second protection switching enable signal, so that the standby optical module can be switched to a working state; therefore, when communication is interrupted due to optical link damage, switching of the optical module can be realized only by correspondingly setting a register bit of the standby optical module through the I2C interface without introducing any hardware equipment, the failed optical link is switched to the normal optical link, the switching speed is high, the realization process is simple, and the time cost and the economic cost are also reduced.
Drawings
Fig. 1 is a partial circuit diagram of a driving chip according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a driving method of an optical module according to an embodiment of the present invention.
Detailed Description
In order to solve the technical problems that in the prior art, when an optical link is damaged to cause communication interruption and a failed optical link needs to be switched to a standby optical link in the process of using a PON device for communication, the implementation complexity is high and the cost is increased, the invention provides a driving chip, an optical module, a switching method of the optical module and the PON device, wherein the driving chip is applied to the optical module or a bidirectional optical component on a board, and the driving chip comprises: the device comprises a register, a laser driver and a limiting amplifier; the output end of the register is connected with a first input end of a logic OR gate, and the output end of the logic OR gate is respectively connected with a first port of the laser driver and a first port of the limiting amplifier; the register outputs a received first protection switching enable signal to control burst light enable of the laser driver to be in a failure state, and controls an output end of the limiting amplifier to be in a closed state, so that the optical module is in a non-working state; the register outputs a received second protection enabling signal to control burst light enabling of the laser driver to be in a working state and control the output end of the limiting amplifier to be in the working state, so that the optical module is in the working state; wherein the register bits of the register are preconfigured through the I2C interface.
The technical solution of the present invention is further described in detail by the accompanying drawings and the specific embodiments.
Example one
The present embodiment provides a driving chip, which is applied in a Board on Board (BOSA) for an Optical module or a bidirectional Optical module, as shown in fig. 1, and includes: a register 1, a logic OR gate 2, a laser driver 3 and a limiting amplifier 4;
the output end of the register 1 is connected to the first input end of the logic or gate 2, and the output end of the logic or gate 2 is respectively connected to the first port of the laser driver 3 and the first port of the limiting amplifier 4; the register 1 outputs the received first protection switching enable signal to control the burst light enable BEN of the laser driver 3 to be in a failure state, that is, any burst light enable signal input cannot drive the laser driver 3; even if the interface (SerDes) of the PON Media Access Control (MAC) SERializer/DESerializer of the central processing unit CPU of the passive optical network device has a differential signal input TXIN +/-port, the laser driver 3 cannot drive the optical components to emit light, and the signal integrity of the differential signal will not be affected due to the differential 100 Ω termination impedance termination between TXIN +/-s.
Further, the first protection switching enable signal simultaneously controls the output end of the limiting amplifier 4 to be in an off state, so that the optical module is in a non-working state. That is, even if the limiting amplifier 4 receives an electrical signal that is detected by the optical component and enters RXIN +/-, no signal is output from the signal output terminal RXOUT +/either.
Here, the register 1 may further output a received second protection enable signal to control burst light enable of the laser driver 3 to be in an operating state, and control an output end of the limiting amplifier 4 to be in an operating state, so that the optical module is in an operating state; wherein the first port of the laser driver 3 comprises: a burst enable control port; the first port of the limiting amplifier 4 includes: clipping enables the control port.
Wherein the register bit of register 1 is preconfigured through an I2C interface; the first protection switching enable signal and the second protection switching enable signal are preset digital signals, and the first protection switching enable signal and the second protection switching enable signal are different, that is, when the first protection switching enable signal is at a high level, the second protection switching enable signal is at a low level; when the first protection switching enable signal is at a low level, the second protection switching enable signal is at a high level.
It should be noted that, since the register bit standby of the register 1 needs to be configured by using the I2C interface, the driver chip further includes a storage unit, the register 1 is disposed in the storage unit, and the storage unit is connected to the I2C interface of the driver chip. When the register bit standby of the register 1 is configured by using the I2C interface, the register bit standby can only be configured to be 0 or 1 because the storage unit stores binary information, that is, the protection switching enable signal output by the register 1 is low level or high level.
Here, referring to fig. 1, the driving chip further includes: a protection switching port Standby-SW, configured to receive the first protection switching enable signal and the second protection switching enable signal; and the protection switching port Standby-SW is connected with the second input end of the logic or gate 2. That is to say, the protection switching enable signal input by the protection switching port Standby-SW and the protection switching enable signal input by the register 1 may pass through the logic or gate 2 together, when any one of the protection switching enable signals is a preset enable digital signal, the protection switching function may be triggered to be enabled, otherwise, the protection switching function may not be enabled.
Thus, only one register bit of the standby optical module needs to be correspondingly set through a protection switching port or an I2C interface of the chip, the protection switching of the optical module can be realized without using additional hardware circuits such as a protection switching switch, a CPLD \ FPGA \ singlechip and the like, the board distribution area is not occupied, the cost is low, programming and burning of programmable devices such as the CPLD \ FPGA \ singlechip and the like are not needed, and the realization is simple; and the switching time delay of the protection switching switch is not provided, and the software operation processing time delay of a CPLD \ FPAG \ singlechip and the like is not provided, so that the protection switching time is shortened.
Example two
Corresponding to the first embodiment, the present embodiment provides an optical module, which includes the driving chip described in the first embodiment,
as shown in fig. 1, the driving chip includes: a register 1, a logic OR gate 2, a laser driver 3 and a limiting amplifier 4;
the output end of the register 1 is connected to the first input end of the logic or gate 2, and the output end of the logic or gate 2 is respectively connected to the first port of the laser driver 3 and the first port of the limiting amplifier 4; the register 1 outputs the received first protection switching enable signal to control the burst light enable BEN of the laser driver 3 to be in a failure state, that is, any burst light enable signal input cannot drive the laser driver 3; even if the SerDes interface of the PON MAC of the central processor CPU of the passive optical network device has differential signal input TXIN +/-ports, the laser driver 3 cannot be made to drive the optical components to emit light, and the signal integrity of the differential signal will not be affected due to the differential 100 Ω termination impedance termination between TXIN +/-s.
Further, the first protection switching enable signal simultaneously controls the output end of the limiting amplifier 4 to be in an off state, so that the optical module is in a non-working state. That is, even if the limiting amplifier 4 receives an electrical signal that is detected by the optical component and enters RXIN +/-, no signal is output from the signal output terminal RXOUT +/either.
Here, the register 1 may further output a received second protection enable signal to control burst light enable of the laser driver 3 to be in an operating state, and control an output end of the limiting amplifier 4 to be in an operating state, so as to enable the optical module to be in an operating state; wherein the first port of the laser driver 3 comprises: a burst enable control port; the first port of the limiting amplifier 4 includes: clipping enables the control port.
Wherein the register bit of register 1 is preconfigured through an I2C interface; the first protection switching enable signal and the second protection switching enable signal are preset digital signals, and the first protection switching enable signal and the second protection switching enable signal are different, that is, when the first protection switching enable signal is at a high level, the second protection switching enable signal is at a low level; when the first protection switching enable signal is at a low level, the second protection switching enable signal is at a high level.
It should be noted that, since the register bit standby of the register 1 needs to be configured by using the I2C interface, the driver chip further includes a storage unit, the register 1 is disposed in the storage unit, and the storage unit is connected to the I2C interface of the driver chip. When the register bit standby of the register 1 is configured by using the I2C interface, the register bit standby can only be configured to be 0 or 1 because the storage unit stores binary information, that is, the protection switching enable signal output by the register 1 is low level or high level.
Here, referring to fig. 1, the driving chip further includes: a protection switching port Standby-SW, configured to receive the first protection switching enable signal and the second protection switching enable signal; and the protection switching port Standby-SW is connected with the second input end of the logic or gate 2. That is to say, the protection switching enable signal input by the protection switching port Standby-SW and the protection switching enable signal input by the register 1 may pass through the logic or gate 2 together, when any one of the protection switching enable signals is a preset enable digital signal, the protection switching function may be triggered to be enabled, otherwise, the protection switching function may not be enabled.
Thus, only one register bit of the standby optical module needs to be correspondingly set through a protection switching port or an I2C interface of the chip, the protection switching of the optical module can be realized without using additional hardware circuits such as a protection switching switch, a CPLD \ FPGA \ singlechip and the like, the board distribution area is not occupied, the cost is low, programming and burning of programmable devices such as the CPLD \ FPGA \ singlechip and the like are not needed, and the realization is simple; and the switching time delay of the protection switching switch is not provided, and the software operation processing time delay of a CPLD \ FPAG \ singlechip and the like is not provided, so that the protection switching time is shortened.
EXAMPLE III
Corresponding to the second embodiment, this embodiment further provides a method for switching an optical module, as shown in fig. 2, where the method includes:
s101, receiving a first protection switching enable signal;
in this step, a register is used to receive the first protection switching enable signal. Specifically, the output end of the register is connected to a first input end of a logic or gate, and the output end of the logic or gate is connected to the first port of the laser driver and the first port of the limiting amplifier, respectively. Here, the driving chip further includes: a protection switching port Standby-SW, configured to receive the first protection switching enable signal and the second protection switching enable signal; and the protection switching port Standby-SW is connected with the second input end of the logic OR gate. That is to say, the first protection switching enable signal input by the protection switching port Standby-SW and the first protection switching enable signal input by the register may pass through the logic or gate together, and when any one of the first protection switching enable signals is a preset enable digital signal, the protection switching function enable may be triggered.
Here, the first port of the laser driver includes: a burst enable control port; the first port of the limiting amplifier includes: clipping enables the control port.
Wherein the register bits of the register are preconfigured through an I2C interface; the first protection switching enable signal and the second protection switching enable signal are preset digital signals, and the first protection switching enable signal and the second protection switching enable signal are different, that is, when the first protection switching enable signal is at a high level, the second protection switching enable signal is at a low level; when the first protection switching enable signal is at a low level, the second protection switching enable signal is at a high level.
It should be noted that, since it is necessary to configure the register bit standby of the register by using the I2C interface, the driver chip further includes a storage unit, the register is disposed in the storage unit, and the storage unit is connected to the I2C interface of the driver chip. When the register bit standby of the register is configured by using the I2C interface, the register bit standby can only be configured to be 0 or 1 because the storage unit stores binary information, that is, the protection switching enable signal output by the register is low or high.
S102, controlling burst light enable of a laser driver to be in a failure state by using the first protection switching enable signal, and controlling an output end of the limiting amplifier to be in a closing state; enabling the optical module to be in a non-working state;
when receiving the first protection switching enable signal, outputting the received first protection switching enable signal to control the burst light enable BEN of the laser driver to be in a failure state, namely, any burst light enable signal input cannot drive the laser driver; even if the SerDes interface of the CPU of the PON device has a differential signal input signal TXIN +/-port, the laser driver cannot drive the optical components to emit light, and the signal integrity of the differential signal will not be affected due to the differential 100 omega termination impedance termination between TXIN +/-s.
Further, the first protection switching enable signal simultaneously controls the output end of the limiting amplifier to be in a closed state, so that the optical module is in a non-working state. That is, even if the limiting amplifier receives an electrical signal that the optical component detects entering RXIN +/-, no signal is output at the signal output terminal RXOUT +/either.
S103, receiving a second protection switching enable signal;
when the optical link fails and the standby optical module needs to be switched to a normal working state, receiving a second protection switching enabling signal; similarly, the register and the protection switching port Standby-SW may receive a second protection switching enable signal at the same time, the second protection switching enable signal input by the protection switching port Standby-SW may pass through a logic or gate together with the second protection switching enable signal input by the register, and when any one of the second protection switching enable signal is a preset disable digital signal, the protection switching function is turned off.
S104, controlling the burst light of the laser driver to be in a working state by using the second protection switching enable signal, and controlling the output end of the limiting amplifier to be in the working state; so that the optical module is in an operating state.
In this step, the second protection switching enable signal is used to control the burst light enable of the laser driver to be in a working state, and control the output end of the limiting amplifier to be in a working state; so that the optical module is in an operating state. Thereby making the standby optical module enter a normal working state.
Example four
When the optical module provided in the second embodiment is used for optical communication, the following specific implementation is performed:
the first optical module and the second optical module of the optical network terminal ONT are respectively connected with different uplink ports of the same optical line terminal OLT or are directly connected with the two OLTs, wherein the first optical module enters a normal working state, and the second optical module is in a standby state.
When a communication link from a first optical module to an OLT fails, inputting a first protection switching enabling signal to a Standby-SW port of the first optical module, or enabling a register of the first optical module to output the first protection switching enabling signal through an I2C bus configuration register so that the first optical module is in a non-working state;
then, inputting a second protection switching enable signal to the Standby-SW port of the second optical module, or enabling a register of the second optical module to output the second protection switching enable signal through an I2C bus configuration register, so that the second optical module is in a working state; thus, the second optical module is switched from the standby state to the working state; it should be noted that only one register bit of the standby optical module needs to be set correspondingly through the protection switching port or the I2C interface of the chip, and the switching time is not longer than 50 ms.
EXAMPLE five
The present embodiment provides a PON device, where the PON device includes a processor and an optical module provided in the second embodiment, where the optical module includes: a first optical module and a second optical module; the first optical module is the same as a driving chip of a second optical module, the first optical module is a main optical module, and the second optical module is a standby optical module; taking the first optical module as an example, referring to fig. 1, the driving chip of the first optical module includes: the device comprises a register, a laser driver and a limiting amplifier;
the output end of the register 1 is connected to the first input end of the logic or gate 2, and the output end of the logic or gate 2 is respectively connected to the first port of the laser driver 3 and the first port of the limiting amplifier 4; the register 1 outputs the received first protection switching enable signal to control the burst light enable BEN of the laser driver 3 to be in a failure state, that is, any burst light enable signal input cannot drive the laser driver 3; even if the SerDes interface of the central processing unit CPU of the PON device has a differential signal input signal TXIN +/-port, the driving optical components of the laser driver 3 cannot be made to emit light, and the integrity of the protection switching enable signal will not be affected due to the differential 100 Ω termination impedance termination between TXIN +/-s.
Further, the first protection switching enable signal simultaneously controls the output end of the limiting amplifier 4 to be in an off state, so that the optical module is in a non-working state. That is, even if the limiting amplifier 4 receives an electrical signal that is detected by the optical component and enters RXIN +/-, no signal is output from the signal output terminal RXOUT +/either. For example, when the optical link from the first optical module to the peer device is normal, the first protection switching enable signal is used to control the second optical module to be in a non-working state.
Here, the register 1 may further output a received second protection enable signal to control burst light enable of the laser driver 3 to be in an operating state, and control an output end of the limiting amplifier 4 to be in an operating state, so as to enable the optical module to be in an operating state; wherein the first port of the laser driver 3 comprises: a burst enable control port; the first port of the limiting amplifier 4 includes: clipping enables the control port. For example, when an optical link from the first optical module to the peer device fails, the first protection switching enable signal is used to control the first optical module to be in a non-working state, and the second protection enable signal is used to control the second optical module to be in a working state, so that the optical link is switched to an optical link from the second optical module to the peer device.
Wherein the register bit of register 1 is preconfigured through an I2C interface; the first protection switching enable signal and the second protection switching enable signal are preset digital signals, and the first protection switching enable signal and the second protection switching enable signal are different, that is, when the first protection switching enable signal is at a high level, the second protection switching enable signal is at a low level; when the first protection switching enable signal is at a low level, the second protection switching enable signal is at a high level.
It should be noted that, since the register bit standby of the register 1 needs to be configured by using the I2C interface, the driver chip further includes a storage unit, the register 1 is disposed in the storage unit, and the storage unit is connected to the I2C interface of the driver chip. When the register bit standby of the register 1 is configured by using the I2C interface, the register bit standby can only be configured to be 0 or 1 because the storage unit stores binary information, that is, the protection switching enable signal output by the register 1 is low level or high level.
Here, referring to fig. 1, the driving chip further includes: a protection switching port Standby-SW, configured to receive the first protection switching enable signal and the second protection switching enable signal; and the protection switching port Standby-SW is connected with the second input end of the logic or gate 2. That is to say, the protection switching enable signal input by the protection switching port Standby-SW and the protection switching enable signal input by the register 1 may pass through the logic or gate 2 together, when any one of the protection switching enable signals is a preset enable digital signal, the protection switching function may be triggered to be enabled, otherwise, the protection switching function may not be enabled.
Thus, only one register bit of the standby optical module needs to be correspondingly set through a protection switching port or an I2C interface of the chip, the protection switching of the optical module can be realized without using additional hardware circuits such as a protection switching switch, a CPLD \ FPGA \ singlechip and the like, the board distribution area is not occupied, the cost is low, programming and burning of programmable devices such as the CPLD \ FPGA \ singlechip and the like are not needed, and the realization is simple; and the switching time delay of the protection switching switch is not provided, and the software operation processing time delay of a CPLD \ FPAG \ singlechip and the like is not provided, so that the protection switching time is shortened.
The driving chip, the optical module, the switching method of the optical module and the PON equipment provided by the embodiment of the invention have the beneficial effects that at least:
the invention provides a driving chip, an optical module, a switching method of the optical module and PON equipment, wherein the driving chip is applied to the optical module and comprises the following components: the device comprises a register, a laser driver and a limiting amplifier; the output end of the register is connected with a first input end of a logic OR gate, and the output end of the logic OR gate is respectively connected with a first port of the laser driver and a first port of the limiting amplifier; the register is used for outputting a received first protection switching enable signal to control burst light enable of the laser driver to be in a failure state and control the limiting amplifier to be in a closing state, so that the optical module is in a non-working state; the register is further configured to output a received second protection enable signal to control burst light enable of the laser driver to be in a working state, and control an output end of the limiting amplifier to be in the working state, so that the optical module is in the working state; wherein, the register bit of the register is pre-configured through a bus I2C interface for connecting the microcontroller and peripheral equipment thereof; therefore, if the main optical module is in a normal working state, the standby optical module can be in a non-working state by utilizing the received first protection switching enabling signal; when the main optical module is in fault, the register bit is restored by using the received second protection switching enabling signal, so that the standby optical module can be switched to a working state; therefore, when communication is interrupted due to a link damage fault, any hardware equipment, such as a protection switching switch, a CPLD \ FPGA \ single chip microcomputer and other additional hardware circuits, is not required to be introduced, the board layout area is not occupied, the cost is low, programming and burning of CPLD \ FPGA \ single chip microcomputer and other programmable devices are not required, complicated debugging is not required, optical module switching can be realized only by correspondingly setting one register bit of the standby optical module through a protection switching port or an I2C interface of a chip, the realization process is simple, and the time cost and the economic cost are also reduced; and because there is no switching time delay of the protection switching switch, there is no software operation processing time delay of CPLD \ FPAG \ single chip microcomputer, etc., the protection switching time is shortened, and the response speed is increased.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (10)
1. A driver chip for use in an optical module or a bi-directional optical module in a board, the driver chip comprising: the device comprises a register, a laser driver and a limiting amplifier; wherein,
the output end of the register is connected with the first input end of a logic OR gate, and the output end of the logic OR gate is respectively connected with the first port of the laser driver and the first port of the limiting amplifier;
the register is used for outputting a received first protection switching enable signal to control burst light enable of the laser driver to be in a failure state and control an output end of the limiting amplifier to be in a closed state, so that the optical module is in a non-working state;
the register is further configured to output a received second protection enable signal to control burst light enable of the laser driver to be in a working state, and control an output end of the limiting amplifier to be in the working state, so that the optical module is in the working state; wherein the register bits of the register are preconfigured through an I2C bus interface for connecting the microcontroller and its peripherals.
2. The driver chip of claim 1, wherein the driver chip further comprises: a protection switching port, configured to receive the first protection switching enable signal and the second protection switching enable signal.
3. The driver chip of claim 2, wherein the protection switch port is connected to a second input of the logic or gate.
4. The driver chip of claim 1, wherein the driver chip comprises: and the register is arranged in the storage unit, and the storage unit is connected with the I2C interface of the driving chip.
5. The driver chip of claim 1, wherein the first port of the laser driver comprises: the burst enables the control port.
6. The driver chip of claim 1, wherein the first port of the limiting amplifier comprises: clipping enables the control port.
7. The driver chip of claim 1, wherein the protection switching enable signal is a preset digital signal.
8. An optical module, characterized in that the optical module comprises a driver chip according to any one of claims 1 to 7.
9. A method for switching an optical module, the optical module comprising: a driving chip; the driving chip includes: a laser driver and a limiting amplifier; the method comprises the following steps:
receiving a first protection switching enable signal;
controlling burst light enable of a laser driver to be in a failure state by using the first protection switching enable signal, and controlling an output end of the limiting amplifier to be in a closing state, so that the optical module is in a non-working state;
receiving a second protection switching enable signal;
and controlling the burst light enable of the laser driver to be in a working state by using the second protection switching enable signal, and controlling the output end of the limiting amplifier to be in a working state, so that the optical module is in a working state.
10. A Passive Optical Network (PON) device is characterized by comprising a processor and an optical module, wherein a driving chip of the optical module comprises: the device comprises a register, a laser driver and a limiting amplifier; wherein,
the output end of the register is connected with the first input end of a logic OR gate, and the output end of the logic OR gate is respectively connected with the first port of the laser driver and the first port of the limiting amplifier;
the register is used for outputting a received first protection switching enable signal to control burst light enable of the laser driver to be in a failure state and control an output end of the limiting amplifier to be in a closed state, so that the optical module is in a non-working state;
the register is further configured to output a received second protection enable signal to control burst light enable of the laser driver to be in a working state, and control an output end of the limiting amplifier to be in the working state, so that the optical module is in the working state; wherein the register bits of the register are preconfigured through a bus I2C interface for connecting the microcontroller and its peripherals.
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| CN109244812A (en) * | 2018-11-12 | 2019-01-18 | 深圳市亚派光电器件有限公司 | Laser drive circuit and optical module |
| CN110708121A (en) * | 2019-10-16 | 2020-01-17 | 青岛海信宽带多媒体技术有限公司 | Optical module and control method thereof |
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