KR100435781B1 - Apparatus for Board Location and Configuration Information Cognition in Data Proccessing System - Google Patents

Abstract

The present invention relates to a board position and shape information recognizing apparatus of a data processing system for automatically recognizing position and shape information of a board in a system.

In the related art, an additional device for transferring position information and shape information of the board from the sub-board to the main board is required. However, since it is not stabilized and standardized, reliability of data transmission is deteriorated. In addition, there is a problem that the boundary scan path existing in the conventional board exists only for the test of assembly of components in the board.

The present invention improves the utilization efficiency of the boundary scan path by using the boundary scan path existing only for the in-board assembly test to extract, collect and transmit the position information and the shape information for the shape management in the system. It becomes possible.

Then, using the top-down method for the shape management, the main board requests basic information for shape management to the sub-board, and bottom-up according to the basic information request of the main board. By using the method, the sub-board transmits basic information to the main board, thereby enabling the shape management in both directions.

Description

Apparatus for Board Location and Configuration Information Cognition in Data Proccessing System}

The present invention relates to a board position and shape information recognizing apparatus of a data processing system, and more particularly, to a board position and shape information recognizing apparatus of a data processing system for automatically recognizing the position and shape information of a board in a system.

1 illustrates a road, a central processing unit 110, a programming unit 120, a jumper stick / cable connection unit 130, and a plurality of JTAG (Joint) showing the configuration of a board position and shape information recognizing apparatus of a conventional data processing system. Test Action Group) chip 140-1, 140-2, 140-3, ..., 140-n and an edge connector 150.

In such a configuration, the central processing unit 110 receives the position information signal of the board in the system from the programmable programming unit 120.

Here, the position information refers to the position where the board is physically mounted in the system, and the position information of the system may be divided into a rack, a shelf, a back-plane board, and a slot. have.

Meanwhile, the programming unit 120 receives the m bit position information signal from the edge connector 150 and transmits the m bit position information signal to the central processing unit 110.

The jumper stick / cable connection unit 130 is connected to a JTAG port signal such as TCK (Test ClecK), TMS (Test Mode Signal), TDI (Test Data Input), TRST (Test ReSeT), and TDO (Test Data Output). .

The plurality of JTAG chips 140-1, 140-2, 140-3,..., 140-n perform a boundary scan test by transmitting a JTAG port signal to the next connected JTAG chip.

Edge connector 150 connects any board of the system to the backplane board.

In the backplane board described above, a board, commonly referred to as a circuit pack, can be mounted via an edge connector and assembled in a self to mount and support the board.

Hereinafter, an operation of a board position and shape information recognizing apparatus of a conventional data processing system will be described with reference to FIG. 1.

First, when an arbitrary board is mounted, the backplane board applies position information, which is a combination of logic values '1' and '0', to the board to inform the board where the board is physically mounted.

Accordingly, the programming unit 120 of the board receives position information from the backplane board through the edge connector 150 and transfers the position information to the central processing unit 110.

The central processing unit 110 reads the location information transmitted from the programming unit 120 using firmware, and then performs overall management of the main board (operation, maintenance, maintenance, configuration management, etc.) through an internal connection communication path. It transmits the location information and the shape information (name of the board physically mounted in the system) on which the board is mounted.

The main board receiving the location information and the shape information on which the board is mounted from the sub-board through the internal connection communication path performs the shape management based on the received information.

As described above, the central processing unit 110 of the sub-board is to transfer the position information and the shape information of the board to the main board mounted on another backplane board, the position information and the shape information of the board to the main board In order to communicate, there must be some form of connection between the two boards. In addition, there is a need for an additional device for data transmission, which is not stabilized and standardized, resulting in a low reliability of data transmission.

Meanwhile, as the size of the system becomes smaller, the size of printed circuit boards (PCBs) and semiconductor devices is gradually reduced, the number of pins increases, and the spacing of the pins becomes dense.

And, the packaging form of the device is made of QFP (Quad Flat Pack), BGA (Ball Grid Array), TSOP (Thin Small Outline Package), etc., making probing itself difficult for testing, and assembling both sides of the device on the PCB. The in-circuit test (ICT) made it impossible or even more difficult to test the assembly.

As a result, the Boundary scan test has been proposed as a new alternative for testing the assembly of printed board assemblies (PBAs), in which small, tightly spaced pins are difficult to probe. General standards for rescan tests are specified in IEEE Standard 114.1-1990 (includes IEEE Std 1149.1a-1993 Test Access Port and Boundary Scan Architecture) and IEEE Standard 1149.1b-1990, IEEE Standard Test Access Port and Boundary Scan Architecture. have.

The Boundary Scan test can be applied from the device level test to the board level and the system level. For this test, a register called a Boundary Scan cell is provided with the device's input / output pads and core logic. Should be implemented in the middle.

As described above, the boundary scan cell is controlled by JTAG port signals such as TCK, TMS, TDI, TDO, and TRST, and controls TDI by TCK, TMS, and TRST, which are referred to as TAP (Test Access Port) controllers.

The TAP controller consists of 16 state diagrams and applies test data test patterns to the TDI. The data approved by TDI includes infrastructure test, identification test, test reset test, TRST test, interconnection test, cluster test, and external. After executing various commands such as Test, the test results are exported to TDO.

By capturing and analyzing the data output through the TDO cable at the jumper stick / cable connection unit 130, the stuck-at fault, bridge, open, and short ( Short) can be known.

As described above, there is a problem that the boundary scan path existing in the conventional board exists only for the test for assembly of components in the board.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and by using the boundary scan path to extract, collect, and transmit location information and shape information for configuration management in the system, the utilization efficiency of the boundary scan path can be increased. It is an object of the present invention to provide an apparatus for recognizing board position and shape information of a data processing system.

1 is a diagram showing the configuration of a board position and shape information recognizing apparatus of a conventional data processing system.

2 is a diagram showing the configuration of a board position and shape information recognizing apparatus of a data processing system according to the present invention;

*** Explanation of symbols for the main parts of the drawing ***

200. Random unit board,

210. IDCODE register control and shape information storage / retrieval unit,

215. shape information storage unit,

220. location information signal selection and transmission unit,

230. location information signal generator,

240-1, 240-2, 240-3,... , 240-n. Jtag chip,

245.IDCODE register, 250.edge connector

A board position and shape information recognizing apparatus of a data processing system according to the present invention for achieving the above object includes a position information signal generation unit for generating a position information signal of a board in a system; A location information signal selection and transmission unit which receives the location information signal from any one of a connector and the location information signal generator and transmits the location information signal to a register in an arbitrary JTAG; And a register control and shape information storage / retrieve section for accessing the register in accordance with the position information request signal applied from the main board, reading the position information recorded in the register, and transferring the read position information to the main board.

The register control and shape information storing / retrieving unit may receive a position information request signal from the main board through a cable and a boundary scan path, and read position information from the register according to a register control signal. .

The position information signal generator may generate the position information signal based on the Vcc applied voltage applied according to the board mounting.

On the other hand, when the register control and shape information storage / retrieval unit is provided on the main board, the position information received from the sub-board is recorded in a register in an arbitrary JTAG, and the shape information provided in the main board as the position information. The shape information is obtained by searching the storage unit.

The register control and shape information storing / retrieving unit may receive position information from the sub-board through a cable and a boundary scan path, and record the position information in the register according to a register control signal.

The shape information storage unit may store shape information predefined for each board in a database format.

Hereinafter, a board position and shape information recognizing apparatus of a data processing system according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a road showing the configuration of a board position and shape information recognition apparatus of a data processing system according to the present invention, an IDCODE register control and shape information storage / retrieval unit 210, a position information signal selection and transmission unit 220, The position information signal generator 230, a plurality of JTAG chips 240-1, 240-2, 240-3,..., 240-n and an edge connector 250 are provided.

In such a configuration, the IDCODE register control and shape information storage / retrieval unit 210 is an IDCODE register in the first JTAG chip 240-1 through a control signal of the IDCODE register 245 when the corresponding board is a sub-board. Access 245 to read the information written by the 11-bit positional information signal, and if the board is the main board, write 11-bit positional information directly to the IDCODE register 245, and IDCODE register 245 By using the location information recorded in the above, the shape information of the board is searched / generated by comparing with the shape information stored in the database format in the shape information storage unit 215 of the board in the system through 0_TCK, 0_TMS, 0_TDI, 0_TRST, and n_TDO.

Here, the shape information stored in the shape information storage unit 215 means that the shape information storage unit 215 stores the shape information of the system defined in advance by firmware in the board in the shape information storage unit 215. The board ID (= The shape information corresponding to the position information) is stored in a database format.

In addition, the IDCODE register control and shape information storage / retrieval unit 210 binds 11-bit position information read from the IDCODE register 245 through a control signal of the IDCODE register 245 together with an internal connection communication method implemented in the system. By using the rescan pass method, it is transferred to the main board that performs overall system management such as operation, maintenance, maintenance, and configuration management in the system.

That is, IDCODE register control and shape information storage and retrieval unit using the M_TCK, M_TMS, M_TDI, M_TRST connected to the IDCODE register control and shape information storage and retrieval unit 210 through the edge connector 250 ( When the position information request signal is applied to the 210, the IDCODE register control and shape information storage / retrieval unit 210 receives 11-bit position information read from the IDCODE register 245 based on the position information request signal through the M_TDO edge connector. Transferring to the 250, the edge connector 250 consists of a process of transferring the location information received through the M_TDO to the main board through the cable.

Here, in the case where a plurality of backplane boards are provided in the system, since the backplane board on which the subboard is mounted is connected to the backplane board on which the main board is mounted, when the position information is transmitted from the edge connector 250 to the cable, After the location information is collected centrally from the main board, the board is managed with the software block that performs the shape management.

On the other hand, when there is one backplane board in the system, since M_TCK, M_TMS, M_TDI, M_TRST and M_TDO are interconnected in one backplane board, one backplane board collects the shape management.

Meanwhile, the position information signal selection and transmitter 220 includes an 11 bit position information signal input through the edge connector 250 or an 11 bit position information signal input from the position information signal generator 230 in an arbitrary JTAG chip. In the embodiment of the present invention, the data is transmitted to the IDCODE register 245 provided in the first JTAG chip 240-1.

Here, the 11-bit positional information signal input through the edge connector 250 and the 11-bit positional information signal input from the positional information signal generator 230 are required when testing in conjunction with other hardware in the system or the system, respectively. This is necessary when you want to test alone without a backplane within.

As described above, the 11-bit position information signal input through the edge connector 250 is a value input from the backplane board into which the edge connector 250 is inserted. The backplane board is a physical board in the system when any board is mounted. In order to inform the location to be mounted, the location information consisting of a combination of logic values '1' and '0' is applied to the board.

The 11-bit position information signal input from the position information signal generator 230 is position information of a board in the system generated by the position information signal generator 230 and is a combination of logical values '1' and '0'. Is done.

The location information signal generator 230 generates a location information signal of a board in the system based on the Vcc applied voltage applied as the board is mounted on the backplane board, and transmits the location information signal to the location information signal selection and transmitter 220.

The plurality of JTAG chips 240-1, 240-2, 240-3,..., 240-n are IEEE 1149.1-applied devices. Each JTAG chip 240-1, 240-2, 240-3,. -n) consists of an IDCODE register and performs a boundary scan test by sending a JTAG port signal to the next connected JTAG chip.

Here, the first JTAG chip 240-1 transmits 1_TCK, 1_TMS, 1_TDI, and 1_TRST signals to the second JTAG chip 240-2 for the boundary scan test, and the second JTAG chip 240-2 is transmitted. 2_TCK, 2_TMS, 2_TDI, and 2_TRST signals are transmitted to the third JTAG chip 240-3 for the boundary scan test, and the nth JTAG chip 240-n, the last JTAG chip, is the first JTAG chip for the boundary test. The n_TDO signal is transmitted to the register control and shape information storage / retrieval unit 210.

The IDCODE register 245 described above is specified in IEEE 1149.0-1990 and, as shown in Table 1, consists of a total of 32 bits.

beat Explanation Bits 31-28 (4 bits) Version Bits 27-12 (16 bits) Part number 11 to 1 bit (11 bits) Manufacturer identity Bit 0 Fixed to 1 (LSB)

Bits 31 to 12 of the above bits are a reference for IDCODE register control and shape information storage / retrieval unit 210 to generate shape information through a boundary scan path including TCK, TMS, TDI, TRST, and TDO signals in a board. Bits 11 to 1 become reference for the IDCODE register control and shape information storage / retrieval unit 210 to know the position information. Also, bits 11 to 1 must be read or written by the IDCODE register control and shape information storage / retrieval unit 210 by the control signal of the IDCODE register 245, and the location information signal selection and transmission unit 220 may be used. Write must be enabled by an 11-bit positional information signal applied from the.

Hereinafter, an operation of the board position and shape information recognizing apparatus of the data processing system according to the present invention will be described with reference to FIG. 2.

First, when any board is mounted on the backplane board through the edge connector 250, an 11-bit location information signal is applied from the backplane board to the location information signal selection and transmitter 220 through the edge connector 250, or the location information When the 11-bit location information signal generated by the signal generator 230 is applied to the location information signal selection and transmitter 220, the location information signal selection and transmitter 220 may be an edge connector 250 or a location information signal generator ( An 11-bit positional information signal is received from 230 and written to the IDCODE register 245 in the first JTAG chip 240-1.

On the other hand, if any board is mounted on the backplane board to perform overall management of the system, the IDCODE register control and shape information of the board mounted on the backplane board using the internal connection communication method and the boundary scan path. The location information request signal is applied to the storage / retrieval unit 210.

As described above, the IDCODE register control and shape information storage / retrieval unit 210 receiving the position information request signal from the main board, according to the IDCODE register control signal, the first JTAG chip 240 in which the position information of the board is recorded. -1) Access the IDCODE register 245 to read the location information of the board, and send the read location information to the main board through M_TDO.

On the other hand, in the main board receiving the location information from the board mounted on the backplane board according to the location information request signal, the location information received from the subboard through the cable and the boundary scan path is converted into the first JTAG chip (the IDCODE register control signal). 240-1) in the IDCODE register 245 and by searching the shape information storage unit 215 provided separately in the board by the position information recorded in the IDCODE register 245 to determine the shape information of the board. .

The board position and shape information recognizing apparatus of the data processing system of the present invention is not limited to the above-described embodiments, and can be modified in various ways within the scope of the technical idea of the present invention.

According to the apparatus for recognizing board position and shape information of the data processing system of the present invention as described above, the positional information and shape information for the shape management in the system are extracted from the boundary scan path that existed only for the in-board assembly test. By using it to collect, transmit, or transmit, the utilization efficiency of the boundary scan path can be improved.

Then, using the top-down method for the shape management, the main board requests basic information for shape management to the sub-board, and bottom-up according to the basic information request of the main board. By using the method, the sub-board transmits basic information to the main board, thereby enabling the shape management in both directions.

Claims (6)

A position information signal generator for generating position information signals of boards in the system; A location information signal selection and transmission unit which receives the location information signal from any one of a connector and the location information signal generator and transmits the location information signal to a register in an arbitrary JTAG; Data comprising a register control and shape information storage / retrieve section for accessing the register in accordance with the position information request signal applied from the main board, reading the position information recorded in the register, and transferring the read position information to the main board. Board position and shape information recognition device of processing system. According to claim 1, wherein the register control and shape information storage / retrieval unit is provided on the main board, A position of the board of the data processing system, wherein the position information received from the sub-board is recorded in a register in an arbitrary JTAG, and the shape information is retrieved by searching the shape information storage unit provided in the main board with the position information; Shape information recognition device. The method of claim 2, wherein the register control and shape information storage / retrieval unit, And receiving position information from the sub-board through a cable and a boundary scan path, and recording the position information in the register according to a register control signal. The method of claim 2, wherein the shape information storage unit, A device for recognizing board position and shape information of a data processing system, wherein shape information predefined for each board is stored in a database format. The method of claim 1, wherein the location information signal generation unit, A board position and shape information recognition device of a data processing system, characterized in that for generating a position information signal based on the Vcc applied voltage applied according to the board mounting. The method of claim 1, wherein the register control and shape information storage / retrieval unit, And a position information request signal from the main board through a cable and a boundary scan path, and read position information from the register according to a register control signal.