JP2001092775A - Compact pci board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of boards to be stocked for development, etc. SOLUTION: This compact IC board is provided with a first compact PCI connector 2, a CPU 5, a memory 7 and an interface 8 connected with a local bus 6, a system board circuit 12 to make a control processing of a system possible when it is connected with the first compact PCI bus and the CPU 5, a target board circuit 13 to make access to the memory 7 and the interface 8 possible when it is connected with the first compact PCI bus and the local bus 6, a PCI local bus circuit 15 to connect the system board circuit 12 or the target board circuit 13 with the local bus 6, a connecting/disconnecting part 10 to connect or disconnect the CPU 5 with/from the local bus 6 and a first selective connection part 14 to selectively connect either the system board circuit 12 or the target board circuit 13 with the first compact PCI connector.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
(Compact) PCI (Peripheral Component Intercon)
nect), that is, a compact PCI board.

[0002]

2. Description of the Related Art Compact PCI is a PICMG (PC) which was established to apply PCI to industrial applications.
I Industrial Computer Manufacturers Group).

[0003] As shown in FIG.
A system board 101 is connected to the bus 100.
The system board 101 includes a module that includes a CPU and controls each unit of the system.
As shown in FIG. 9, it is inserted into the system slot of the rack 200 and connected to the back panel 201 by the connector 202. In addition to the system board 101, up to eight boards 102 to
109 is connectable.

The types of the boards 102 to 109 include a target board, a bridge board, an extender, and a test board. In FIG. 7, for example, the board 109 is a target board, and the target board 109 includes a memory, an external interface such as an Ethernet interface and a SCSI interface. The target board 109 is inserted into a peripheral slot in the same manner as the system board 101 shown in FIG.
1 is connected by a connector.

The bridge board 103 is a compact PC
A board for expanding the I bus 100, for example,
When the board 103 in FIG. 7 is a bridge board, it is connected to another compact PCI bus 120 as shown in FIG. 8, and one board includes boards 121 to 128 connected to the compact PCI bus 120. Is configured. At this time, the bridge board 103 functions as a system board connected to the compact PCI bus 120 only for the boards 121 to 128, and the compact PCI bus 120 is controlled by the system board 101.

[0006] The bridge board 103 is inserted into peripheral slots of racks 200 and 300, for example, as shown in FIG.
1 and 301 are connected by connectors 204 and 304. Here, the back panel 201 corresponds to the compact PCI bus 100, and the back panel 301 corresponds to the compact PCI bus 120.

As shown in FIG. 11, for example, a test board includes a programmable circuit 14 such as a programmable gate array for freely realizing a function required by a user.
1, a local bus interface unit 142 for connecting the circuit 141 and the local bus, and an FPGA (Field Programmable Gate Arra) having the local bus.
y). This test board is also inserted into a peripheral slot in the same manner as the system board 101 shown in FIG. 9 is inserted into the rack 200, and is connected to the back panel 201 by the connector 202.

The extender 105 is a compact PCI
When the signal line of the bus 100 is taken out of the rack and the signal of the compact PCI is checked outside, or when a board that does not fit into the rack is used, the signal line is inserted into the rack 200 as shown in FIG. Back panel 20
1 is connected by a connector 203, and a board 230 that does not enter the rack 200 is connected to a connector 206 provided on the extender 105 outward. This board 230 is functionally a system board or a target board.

The above-mentioned system board, target board, bridge board, extender, and test board are:
Each board is a single board for the following reasons.
First, the input / output function of the interface to the compact PCI bus differs between the system board and the target board. Further, the bridge board, the extender, and the test board are special boards that are not usually used, and are required to use one of predetermined functions in a special case.

The system board, target board, bridge board, extender, and test board are:
System development by compact PCI, compact P
Development of CI board, compact PC installed in rack
When developing an I-back panel, newly developed components are required to verify operation. For example, when a new system board is developed, a target board, bridge board, or test board that has already been developed is required, and when a new target board is developed, a system board, bridge board, or test board that is already developed is required. Is required.

In addition, an extender is required for checking the signal of the compact PCI, and when a prototype of an interface controller designed by a user is created or a new system board is developed, a target board convenient for verification is realized. Test board for FP
GA becomes effective.

From the above circumstances, conventionally, a system board, a target board, a bridge board, an extender, and a test board are all prepared in preparation for development and the like.
The necessary boards were taken out and used when needed.

[0013]

However, not all of these boards are required at the same time.
In some cases, a plurality of target boards or the like are required. Even if the target boards are temporarily useless, they need to be stocked in anticipation of the necessity, which is not efficient.

The present invention relates to such a conventional compact P
The purpose was to solve the problems related to the Compact PCI board during the development of CI.
An object of the present invention is to provide a compact PCI board capable of reducing the number of boards stocked for development or the like and realizing necessary board functions.

[0015]

A compact PCI board according to the present invention comprises a first connector connected to a first compact PCI bus, a CPU for performing various processes according to a program, a memory connected to a local bus, and An interface connected to another system, a circuit for a system board that enables control processing of the system when connected to the first compact PCI bus and the CPU, the first compact PCI bus and the local A target board circuit that enables access to a memory and an interface connected to the local bus when connected to the bus, and a connection between the system board circuit or the target board circuit and the local bus. A PCI local bus circuit to enable the CPU A connection / disconnection unit for connecting or disconnecting between a local bus and a first selective connection for selectively connecting either the system board circuit or the target board circuit to the first connector; And a unit. With such a configuration, 1
With one board, either the system board circuit or the target board circuit can be selected to realize the system board or the target board.

Further, a compact PCI board according to the present invention provides a programmable circuit having a local bus interface section and a newly developed circuit section for realizing a required function in a programmable manner, and any one of the programmable circuit and the local bus. And a second selection connection unit for selectively connecting to a PCI local bus circuit. Thereby, a test board can be further realized.

Further, the compact PCI board according to the present invention has a second connector connected to a second compact PCI bus, and a second connector connected to the second connector, the second compact PCI bus and the first connector. A bridge circuit that communicates with a compact PCI bus and extends the compact PCI bus, wherein the first selective connection unit is configured to be capable of selectively connecting the bridge circuit to the first connector. It is characterized by being. Thereby, a bridge board can be further realized.

Further, the compact PCI board according to the present invention includes a third connector for connecting to another board, wherein the first selective connection section connects the third connector to the first connector. Is configured to be selectively connectable. Thereby, an extender can be further realized.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A compact PCI board according to an embodiment of the present invention will be described below with reference to the accompanying drawings.
In each drawing, the same components are denoted by the same reference numerals, and redundant description will be omitted. FIG. 1 shows a configuration of a compact PCI board 1 according to an embodiment of the present invention.
The compact PCI board 1 includes a first compact PCI connector 2 connected to a first compact PCI bus provided on a rack 200 as shown in FIG.
00 and a second compact PCI connector 3 connected to a second compact PCI bus. Further, when used as an extender, the compact P on the side opposite to the side on which the first compact PCI connector 2 and the second compact PCI connector 3 are provided.
On the periphery of the CI board 1, a third compact PCI connector 4 connected to another board is provided.

The compact PCI board 1 is provided with a CPU 5 for performing various processes according to a program. The CPU 5 is used to realize a system board. In addition, a local bus 6 is provided, and the local bus 6 is connected to a memory 7 including a ROM and a RAM, and an external interface 8 such as an Ethernet interface and a SCSI interface. CPU 5 and local bus 6
A connection / disconnection unit 10 composed of a switch, a wire, or the like is provided therebetween. A connector 9 is connected to the interface 8. Note that the memory 7 connected to the local bus 6 may be plural,
Further, a plurality of interfaces 8 may be provided.

The compact PCI board 1 has a second compact PCI connector 3 and a first compact P connector.
A PCI-PCI bridge circuit 11 that communicates with the CI connector 2 and extends a compact PCI bus is provided.

The compact PCI board 1 further includes a system board circuit 12 and a target board circuit 13.
Are provided. The system board circuit 12 enables a control process to be performed by the CPU 5 via the first compact PCI bus when the system board 12 is connected to the first compact PCI bus corresponding to the first compact PCI connector 2. And has a function of arbitration of a compact PCI bus.

Here, in the interface with the compact PCI bus, a bus request signal is input. Further, the system board circuit 12 has a function of transmitting an interrupt signal to the CPU 5 as well as a function of clock distribution. The clock distribution function works so as to output a clock signal in the interface with the compact PCI. In the compact PCI signal, an interrupt signal is input.

The target board circuit 13 enables access to the memory 7 and the interface 8 connected to the local bus 6 via the first compact PCI bus when connected to the first compact PCI connector 2. And a circuit used when executing the function of the test board.

Therefore, the target board circuit 13 is
It does not have the function of arbitration of the compact PCI bus, and only outputs a bus request signal at the interface with the compact PCI bus. Further, it does not have a clock distribution function, and receives a clock signal at an interface with a compact PCI bus. That is, the clock is obtained from the system board. In addition, an interrupt signal is output, and the interrupt signal is output in the compact PCI signal.

The compact PCI board 1 has one of a PCI-PCI bridge 11, a system board circuit 12, a target board circuit 13, and a third compact PCI connector 4 with respect to the first compact PCI connector 2. 1st selective connection part 1 for selectively connecting one
4 are provided. The first selection connection unit 14 can be configured by an analog switch, a dip switch, a wire, or the like.

The system board circuit 12 and the target board circuit 13 include a PCI local bus circuit 15.
Is connected. This PCI local bus circuit 15
Has a function of mediating between the local bus 6 and the system board circuit 12 or the target board circuit 13 and is connected to the FPGA 16 so that the local bus in the FPGA 16 and the system board circuit 12 or the target board circuit 13 It has a function to mediate.

The compact PCI board 1 includes an FPGA
16 are provided. The FPGA 16 has a configuration as shown in FIG. 11, is capable of creating a prototype of an interface controller designed by a user, and is capable of newly developing a system board and the like. The connector section 17 is connected to the FPGA 16.

The PCI local bus circuit 15 is connected to a second selection connection section 18 for selectively connecting any one of the local bus 6 and the FPGA 16.
The second selection connection unit 18 can be configured by an analog switch, a wire, or the like.

The compact PCI configured as described above
The board 1 includes a connection / disconnection unit 10, a first selective connection unit 1
4. By switching the connection state in the second selection connection unit 18, it can be changed to any of a system board, a target board, a bridge board, an extender, and a test board.

As shown in FIG. 2, the connection / disconnection unit 10
, The CPU 5 and the local bus 6 are connected, the first connector 2 is connected to the first connector 2 and the system board circuit 12, and the second selective connector 18 is connected to the PCI local bus circuit 15. A compact PCI system that has an interface based on the function of an interface 8 (for example, an Ethernet function by using an Ethernet controller) by connecting to the local bus 6, has a memory 7, and is controlled by the CPU 5. The board can be configured. This board can be used by inserting it into a system slot on the back panel of a compact PCI rack.

As shown in FIG. 3, the connection / disconnection unit 10
In the above, the CPU 5 and the local bus 6 are disconnected from each other,
Connect the first connector 2 and the circuit 13 for the target board at the selective connection
By connecting the PCI local bus circuit 15 and the local bus 6 in the above, a target board having the memory 7 can be configured while providing an interface by the function of the interface 8. This board can be used by inserting it into a peripheral slot on the back panel of a compact PCI rack.

As shown in FIG. 4, the connection / disconnection unit 10
In the above, the CPU 5 and the local bus 6 are disconnected from each other,
Connect the first compact PCI connector 2 to the PCI-PCI bridge 11 at
PCI local bus circuit 1
By separating 5 from the local bus 6 and the FPGA 16, a bridge board can be configured. The board inserts a first compact PCI connector 2 into the last slot of the primary bus in a compact PCI rack and a second compact PCI connector 3
It can be used by inserting it into a system slot of a secondary bus in a compact PCI rack.

As shown in FIG. 5, the connection / disconnection unit 10
In the above, the CPU 5 and the local bus 6 are disconnected from each other,
The first connector 2 and the third connector 4 are connected to each other at the selective connection section 14 of FIG.
The CI local bus circuit 15 is connected to the local bus 6 and the FPG.
By separating from the A16, an extender can be configured. This board is the first compact PCI
The connector 2 can be inserted into a slot in a compact PCI rack, and can be used for extracting signals inside the compact PCI rack from the third compact PCI connector 3 to which the first compact PCI connector 2 is connected.

As shown in FIG. 6, the connection / disconnection unit 10
In the above, the CPU 5 and the local bus 6 are disconnected from each other,
Connect the first connector 2 and the circuit 13 for the target board at the selective connection
The PCI local bus circuit 15 is replaced with an FPGA 16
, A test board having a function programmed by the user can be configured.

As described above, one compact PCI board 1 can realize any of a system board, a target board, a bridge board, an extender, and a test board. Also, as compared with a case where the system board, the target board, the bridge board, the extender, and the test board are stocked respectively, the first compact PCI connector 2, the memory 7, the interface 8, the system board circuit 12, the target board circuit 13, Since the PCI local bus circuit 15 is shared, the number of components can be reduced and the circuit can be configured at low cost.

Then, one compact PCI board 1
The system board and the target board which have already been developed by using the system can be connected to the compact PCI bus, and the system board and the target board can be developed. The system development and the test can be performed as a bridge board, an extender and a test board. Is also possible. In addition, by configuring a plurality of target boards using a plurality of compact PCI boards 1 or configuring a system board and a target board, development of a back panel of another tagging board or a rack is performed. Is possible.

[0038]

As described above, according to the compact PCI board of the present invention, any one of the system board, the target board, the bridge board, the extender, and the test board can be realized by one compact PCI board. it can. Also, as compared with the case where the system board, the target board, the bridge board, the extender, and the test board are stocked respectively, the first compact PCI connector, the memory, the interface, the circuit for the system board, the circuit for the target board, the PCI
The circuit for the local bus is shared, so that the number of components can be reduced and the circuit can be configured at low cost.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a compact PCI board according to an embodiment of the present invention.

FIG. 2 is a diagram showing wiring when a system board is configured by the compact PCI board according to the embodiment of the present invention;

FIG. 3 is a diagram showing wiring when a target board is configured by the compact PCI board according to the embodiment of the present invention;

FIG. 4 is a view showing wiring when a bridge board is configured by the compact PCI board according to the embodiment of the present invention;

FIG. 5 is a diagram showing wiring when an extender is configured by the compact PCI board according to the embodiment of the invention;

FIG. 6 is a diagram showing wiring when a test board is configured by the compact PCI board according to the embodiment of the invention;

FIG. 7 is a configuration diagram of a system showing a board connected to a compact PCI bus.

FIG. 8 is a configuration diagram of a system in which a compact PCI bus is extended.

FIG. 9 is a perspective view showing a state where a board is inserted into a rack having a compact PCI bus.

FIG. 10 is an exemplary perspective view showing a state where an extender is inserted into a rack having a compact PCI bus;

FIG. 11 is a diagram showing a configuration of a test board connected to a compact PCI bus.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 compact PCI board 2 first compact PCI connector 3 second compact PCI connector 4 third compact PCI connector 5 CPU 6 local bus 7 memory 8 interface 9, 17 connector 10 connection / disconnection unit 11 PCI-PCI bridge 12 Circuit for system board 13 Circuit for target board 14 First selection connection 15 Circuit for PCI local bus 16 FPGA 18 Second selection connection

Claims (4)

[Claims] A first connector for connecting to a first compact PCI bus; a CPU for performing various processes according to a program; a memory connected to a local bus and an interface for connecting to another system; A system board circuit that enables control processing of the system when connected to the compact PCI bus and the CPU; and a connection to the local bus when connected to the first compact PCI bus and the local bus. A target board circuit enabling access to the connected memory and interface, and a PCI enabling connection between the system board circuit or the target board circuit and the local bus
A circuit for a local bus; a connection / disconnection unit for connecting or disconnecting the CPU and the local bus; and a circuit for the system board or the circuit for the target board connected to the first connector. A compact PCI board, comprising: a first selection connection unit for selectively connecting. 2. A programmable circuit comprising a local bus interface section and a new development circuit section which programmatically implements a required function, and selectively connects either the programmable circuit or the local bus to the PCI local bus circuit. 2. The compact PCI board according to claim 1, further comprising: a second selection connection unit. 3. A second connector for connecting to a second compact PCI bus, connected to the second connector for communicating between the second compact PCI bus and the first compact PCI bus. A bridge circuit for expanding a compact PCI bus, wherein the first selective connection unit connects the bridge circuit to the first
3. The compact PCI board according to claim 1, wherein said connector is configured to be selectively connectable to said connector. 4. A third connector for connecting to another board, wherein the first selective connection portion is configured to selectively connect the third connector to the first connector. The compact PCI board according to any one of claims 1 to 3, wherein: