JPH0721132A - Method for mounting electronic circuit - Google Patents

Abstract

PURPOSE:To use the capability of a processor up to its maximum by providing a mother board with a common bus for extension and mounting a processor board together with an extension board. CONSTITUTION:The common bus 4 for extension which makes a communication between a electronic circuit for a processor and an electronic circuit for extension is connected to the connector 2 of the electronic circuit for the processor fitted to the mother board 1, and the electronic circuit for the processor which uses the electronic circuit for extension mounted in an optional connector 2 of the mother board 1 is provided with a means which indicates a connection with the common bus 4 for extension. This means connects the electronic circuit for the processor, processor electronic circuit, and the electronic circuit for extension under its control through the common bus 4 for extension, and the electronic circuit for processor and electronic circuit for extension are both mounted together in the connectors of the electronic circuit for the processor. Consequently, the processor of the electronic circuit for the processor has an electronic circuit for extension extended through the common bus 4 for extension.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of mounting an electronic circuit in a multiprocessor system.

[0002]

2. Description of the Related Art In recent years, due to improvements in semiconductor technology, processor electronic circuits (processor boards) having processors
Can be realized with one printed wiring board, and it has become possible to realize a building block type load distribution type multiprocessor system in which a plurality of processor boards are mounted on one motherboard.

As an example of such a conventional technique, a line control system such as a packet switch is shown in FIG. In the figure, 1 is a motherboard, 2 is a connector, 3 is a processor common bus, and 70 is an expansion wiring. Motherboard 1 is 10
One electronic board can be mounted, and the electronic board is, for example, a processor board 5 capable of controlling two lines and an expansion board 6 for increasing the number of controllable lines.
Composed of.

The upper connector 2 of the motherboard 1 shown in FIG.
Is for a processor board 5, the lower connector 2 is for an expansion board 6, and a fixed number of expansion boards 6 correspond to each processor board 5.

[0005]

However, in the prior art, a fixed number of expansion boards are assigned to the processor boards regardless of the capabilities of the processors in the processor boards.

Therefore, if the load on the processor is light and the processor has a margin and it is desired to add another expansion board, the expansion board cannot be added unless a new space for the expansion board is created, and the volume of the equipment is increased. There was a problem that became large.

An object of the present invention is to solve the above-mentioned problems, and it is to use the capacity of the processor to the maximum.

Another object of the present invention is to reduce the volume of the equipment.

[0009]

In order to achieve the above-mentioned object, the present invention provides an extension common for performing communication between a processor electronic circuit and an extension electronic circuit on a connector of a processor electronic circuit mounted on a motherboard. A means for instructing connection to the common bus for expansion is provided to the electronic circuit for the processor which is connected to the bus and uses the electronic circuit for expansion mounted on any connector of the motherboard. The processor electronic circuit, the processor electronic circuit and the expansion electronic circuit under its control are connected via the expansion common bus, and the processor electronic circuit and the expansion electronic circuit are mixed in the connector of the processor electronic circuit. Let's implement.

Further, when a plurality of processor electronic circuits under the control of the expansion electronic circuits are mounted on one motherboard, a common expansion circuit is provided between each processor electronic circuit and the expansion electronic circuit not under the control. The bus connection is cut off, and the processor electronic circuit and the expansion electronic circuit are mounted so that only each processor electronic circuit and the expansion electronic circuit under its control are connected via the expansion common bus.

[0011]

With the above means, the processor electronic circuit and the expansion electronic circuit under its control are connected via the expansion common bus, and the processor electronic circuit and the expansion electronic circuit are mixed in the connector of the processor electronic circuit. Since it is implemented as described above, the processor in the processor electronic circuit can add the expansion electronic circuit according to the drive capability of the processor via the expansion common bus.

Further, when a plurality of processor boards under the control of the expansion board are mounted on one motherboard, the connection of the expansion common bus between the processor board and the expansion board not under the control is cut off, Disables control of expansion boards that are not under processor control.

As a result, even if a plurality of processors are mounted on a single motherboard, the expansion common bus is used,
Expansion electronic circuits can be added according to the drive capacity of the processor.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of an embodiment of the present invention will be described below with reference to FIGS.
This will be described in detail with reference to FIG.

FIG. 1 shows a mother board of a multiprocessor line control system according to an embodiment of the present invention. 1 is a motherboard, 2 is a connector, and 4 electronic boards can be mounted. Reference numeral 3 is a processor common bus for communicating between processor boards, and 4 is an expansion common bus for connecting the processor board and the expansion board.

FIG. 2A shows a processor board,
FIG. 2B shows an expansion board.

First, the processor board 5 shown in FIG.
Includes a processor unit 51, a wiring 52 connected to the processor common bus 3, an expansion bus unit 53, a wiring 54 connected to the expansion bus 4, and a line control unit 55. The processor unit 51 controls the two lines 56 via the line controller 55.

Next, the expansion board 6 shown in FIG. 2B can be expanded with two lines 64. From the expansion bus section 61, the wiring 62 connected to the expansion common bus 4, and the line control section 63. Composed. These are controlled by the processor unit 51 via the expansion bus unit 53, the wiring 54, the expansion bus 4, and the wiring 62.

FIG. 3 shows the details of the expansion bus section 53 of the processor board 5, 53-1 is a bus driver for the expansion common bus 4, and 53-2 is an expansion bus control section. is there.

Reference numeral 53-4 is an inverter circuit, which outputs a logical value "1" when a ground signal is obtained at the ground connection portion 21 of the connector 2 of the mother board 1. 53-5
Is an AND circuit, and the control signal of 53-3 can be transmitted to the bus driver 53-1 only when the output of the inverter circuit 53-4 is "1", and can be sent via the expansion common bus 4.

That is, only the processor board 5 connected to the ground can send the control signal through the expansion common bus 4 and control the expansion board 6.

The processor board 5 which is not connected to the ground cannot send a control signal through the expansion common bus 4 and cannot control the expansion board 6.

Next, a mounting example of the electronic board of this embodiment will be described with reference to FIGS.

First, a case where one processor board 5 under the control of the expansion board 6 and one processor board 5 not under the control of the expansion board 6 are mounted on one motherboard 1 will be described.

FIG. 4 (a) shows that the connectors 2A and 2D of the mother board 1 are provided with the processor board (PRO.) 5 and the connectors 2B and 2C are provided with the expansion board (EXT.) 6. Expansion common bus 4 between each connector
The ground is connected only to the ground connecting portion 21 of the connector 2A as shown in the enlarged view of the main part of the wiring of the expansion common bus 4 in FIG. 4B.

This ground signal enables the processor board 5 of the connector 2A to control the expansion boards of the connectors 2B and 2C via the expansion common bus 4, as described above with reference to FIG. Since the processor board 5 of the connector 2D is not connected to the ground here, the connector 2
The B and 2C expansion boards cannot be controlled.

Further, the processor board 5 of the connector 2A
And the processor board 5 of the connector 2D are also connected by the common bus for expansion, but the expansion bus section 53 of the processor board 5 performs only the processing of transmitting the control signal, and the processor board of the connector 2A and the processor of the connector 2D. The boards cannot receive control signals and cannot control each other. The expansion bus unit 63 of the expansion board performs only the process of receiving the control signal.

Next, a case where a plurality of processor boards 5 under the control of expansion boards 6 are mounted on one motherboard 1 will be described.

FIG. 5 (a) shows that the processor board 5 is mounted on the connectors 2E, 2H, 2J of the motherboard 1 and the expansion board 6 is mounted on the connectors 2F, 2G, 2I, 2K.

Wiring of the expansion common bus 4 between the connectors is carried out between the connectors 2E and 2G, between 2H and 2I, as shown in the enlarged view of the main part of the wiring of the expansion common bus 4 in FIG. 5B.
The extension boards between 2J and 2K and the processor board 5 for controlling the extension boards are connected to each other, and the earth is connected to the earth connection portion 21 of only the processor board 5 under the control of the extension board 6.

Then, the connection of the expansion common bus 4 between the processor board 5 and the expansion board 6 not under its control is cut off.

As a result, as described with reference to FIGS. 3 and 4, each processor board 5 can control only the expansion board 6 under its control.

Therefore, by providing a common bus for expansion on the conventional motherboard and mounting the processor board and the expansion board in a mixed manner on the connector for the processor board, the restriction of the expansion board to the processor board is eliminated and the processor capacity is increased. It can be used to the maximum.

Further, it is not necessary to newly secure a space for the expansion board, and the volume of the device can be reduced.

[0035]

As described above, according to the present invention, the common bus for expansion is provided on the conventional mother board, and the processor board and the expansion board are mixed and mounted.
Remove the limitation of expansion board for processor board,
You can use the full power of the processor.

Further, it is not necessary to newly secure a space for the expansion board, and the volume of the device can be reduced.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a motherboard of this embodiment.

FIG. 2 is a configuration diagram of an electronic board of this embodiment.

FIG. 3 is a diagram for explaining the operation of the expansion bus unit of this embodiment.

FIG. 4 is a diagram for explaining a method of controlling the processor board according to the present embodiment.

FIG. 5 is a diagram for explaining a method of controlling the processor board according to the present embodiment.

FIG. 6 is a block diagram of a conventional motherboard.

[Explanation of symbols]

1 ... Motherboard, 2 ... Connector, 3 ... Processor common bus, 4 ... Expansion common bus, 5 ... Processor board,
6 ... Expansion board.

Claims (2)

[Claims] 1. In a processor system in which a required number of processor electronic circuits are mounted on one motherboard, a connector of the processor electronic circuit mounted on the motherboard is provided between the processor electronic circuit and the expansion electronic circuit. For the processor electronic circuit that uses the expansion electronic circuit that is connected to the expansion common bus that performs communication and that is mounted on any connector on the motherboard,
A means for instructing connection to the expansion common bus is provided, and the processor electronic circuit indicated by the instruction means, the processor electronic circuit, and the expansion electronic circuit under its control are connected through the expansion common bus. A method for mounting an electronic circuit, comprising mounting a processor electronic circuit and an expansion electronic circuit in a mixed manner on a connector of the processor electronic circuit. 2. The electronic circuit mounting method according to claim 1, wherein when mounting a plurality of processor electronic circuits under the control of expansion electronic circuits on one motherboard, the electronic circuit for each processor is The connection of the expansion common bus between the expansion electronic circuits not under its control is cut off, and only the processor electronic circuits and the expansion electronic circuits under its control are connected via the expansion common bus. A method for mounting an electronic circuit, comprising mounting a circuit and an expansion electronic circuit.