JPH0535590B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention mainly relates to a circuit board connecting device used for connecting, for example, an internal memory to be added to a circuit board in an electronic computer system.

<Conventional technology> In a general computer system, since the processing contents differ depending on each user, it is necessary to configure the internal memory to be expanded according to the requests of each user. The conventional expansion means is configured such that a memory circuit board on which a memory element is mounted can be attached and expanded separately from a standard circuit board.

<Problems to be Solved by the Invention> As mentioned above, when increasing the internal memory, the circuit board is attached and added as a unit, so the number of circuit boards increases and the mounting structure thereof becomes complicated. Furthermore, since the number of memory circuit boards increases, maintenance processing becomes complicated, and furthermore, there are various problems such as mounting of driver circuits must be provided on multiple boards.

<Purpose of the Invention> The present invention has been made in view of these problems, and it is possible to increase memory by connecting an auxiliary circuit board on which memory elements, etc. are mounted to a circuit board, without increasing the number of circuit boards. The object of the present invention is to provide a circuit board connection device that can connect the circuit board.

<Means for Solving the Problems> In order to achieve the above object, the circuit board connection device of the present invention is a device for electrically connecting an auxiliary circuit board to a circuit board in a superimposed state, which At least one pair of connectors are disposed on the surface of the circuit board in a non-parallel state, and a connector is disposed on the auxiliary circuit board to correspond to and connect to each connector on the circuit board. This is a summary.

<Function> The circuit board connecting device of the present invention configured as described above can be used, for example, in a state where a memory element is mounted on an auxiliary circuit board and this auxiliary circuit board is superimposed on the circuit board when it is desired to add memory to an electronic computer system. The memory capacity can be increased without increasing the number of memory circuit boards. In addition, the pair of connectors that electrically connect the circuit board and the auxiliary circuit board and attach the auxiliary circuit board are arranged in a non-parallel manner to each other, ensuring that the auxiliary circuit board is not incorrectly connected to the circuit board. This can be prevented.

<Example> Hereinafter, a preferred example of the present invention will be described in detail based on the drawings.

First, the technical background of the present invention will be explained with reference to FIG. 4 showing a circuit board unit. For example, a CPU board in an electronic computer system, various control boards,
Various circuit boards 1, such as memory boards, are housed in a chassis unit 2 in parallel, and each circuit board 1 is held by a pair of guide rails (not shown) formed in the chassis unit 2 to be attached or removed. A connector plug (not shown) provided at the lower end of each of the plugs is freely inserted and connected to a connector jack (not shown) on the motherboard in the chassis unit 1 for electrical connection. Further, for maintenance, each circuit board 1 is provided with a bypass board so that it can be led out from the unit 2. Conventionally, when adding memory, a memory expansion circuit board is installed as described above, so it is necessary to prepare a space and a connection configuration for installing a considerable number of expansion boards in the unit 2. .

The circuit board 1 of the present invention, which is housed and attached to such a unit 2, has a structure as shown in FIG. 1, which shows a memory circuit board, for example. That is, a connector 3 that is electrically connected to the aforementioned connector jack on the motherboard is protruded from the lower end, and RAM chips 4a are arranged in a matrix and soldered directly to the board 1 at the lower left part. As a result, a RAM chip group 4 having a capacity of, for example, 1 Mbyte is provided as standard equipment. Attachment areas 5a, 5b, and
5c, and data bus connectors 6a, 6b, 6c and address/control bus connectors 7a, 7b, 7c are attached to each attachment area 5a, 5b, 5c by soldering. The data bus connectors 6a to 6c are inclined at a predetermined angle with respect to the horizontal address bus and control bus connectors 7a to 7c, and are disposed non-parallel to each other. In addition, a pair of connectors 6a, 7a, 6b, 7b in each mounting area 5a to 5c,
Both 6c and 7c have the same arrangement shape.

Further, an IC group 8 in which memory control ICs 8a are arranged and attached in an L-shape is provided so as to surround the RAM chip group 4 and each mounting area 5a to 5c. 4 and forms part of a memory control circuit that is individually added by each user.

The auxiliary circuit board 9 for memory expansion installed in the mounting areas 5a to 5c is provided with a RAM chip group 10 made of RAM chips 10a identical to the RAM chip group 4 arranged in the same shape and soldered. and each pair of connectors 6a, 7a, 6b, 7b, 6 in each mounting area 5a to 5c.
A pair of connectors 11 and 12 are arranged in the same shape and are provided on the component mounting surface corresponding to the connectors 11 and 7c, and one connector 11 has a RAM chip group 10.
A data bus is connected to the other connector 12, and an address bus and a control bus are connected to the other connector 12, respectively.

If you want to add more memory to the circuit board 1, turn over the auxiliary circuit board 9 from the state shown in FIG.
2 are inserted into the corresponding connectors 6b, 7b, 6c, 7c of the mounting areas 5b, 5c, for example, and are mounted in an electrically connected state. As is clear from FIG. 2 showing this installation state, each RAM chip 10a
is accommodated in the gap formed between the two boards 1 and 9 due to the lengths of the connectors 6b, 7b, 6c, and 7c, making it possible to reduce the thickness of the memory expansion. In other words, as shown in FIG. 4, the gaps between the circuit boards 1 arranged in tandem within the unit 2 are effectively utilized, and the entire device including the unit 2 can be downsized.

Further, since the data bus connectors 6a to 6c are arranged at an angle with respect to the address/connection bus connectors 7a to 7c and are not parallel to each other, the data bus, address bus, and Misconnection with the control bus can be reliably prevented. Furthermore, each installation area 5a~
Each pair of connectors 6a, 7a, 66 in 5c
b, 7b, 6c, and 7c are formed in the same pin arrangement, and each pin signal is also assigned the same, so the auxiliary circuit board 9 can be connected to any of the mounting areas 5a to 5c, and the auxiliary circuit board 9 can be connected to any of the mounting areas 5a to 5c. Compatibility of the circuit board 9 has been obtained. Furthermore, the circuit board 1
RAM chip group 4 and RAM chip group 10 of auxiliary circuit board 9 created in each mounting area 5a to 5c.
However, since the RAM chips 4a and 10a are arranged in the same shape, maintainability is also excellent.

Next, in FIG. 3 showing the electrical configuration, the same or equivalent parts as in FIGS. 1 and 2 are given the same reference numerals, and will be described in detail below. The CPU circuit 13 of the electronic computer system outputs various signals in accordance with the given commands and processes the commands. Connecting portions 14a, 14b, 14 between the data bus connectors 6a to 6c and the data bus connectors 11 of each auxiliary circuit board 9
c, each connection part 15 between each address bus/control bus connector 7a to 7c of the circuit board 1 and the address bus/control bus connector 12 of each auxiliary circuit board 9;
RAM of circuit board 1 via a, 15b, 15c
Chip group 4 and each mounting area 5 indicated by broken lines
It is connected to each RAM chip group 10 of the auxiliary circuit board 9 connected to the RAM chips a to 5c, respectively. Each RAM chip group 4, 10 has a CPU circuit 1.
3 supplies bidirectional data bus D ₀ to 31, lower address data A _{L0 to o} , and a read/write control signal R/W indicating whether to read the contents of the memory or write data to the memory. In addition, each RAM chip group 4, 10 is selected from address comparators 16a to 16d.
Chip selection signals Sa to Sd are supplied to the chip groups 4 and 10. Also, each RAM allocated by a switch etc.
The output of the start address setting circuit 17 of chip groups 4 and 10 and each additional RAM chip group 1
Preset constant data K1, K2, and K3 indicating the difference between the first address of 0 and the first address of circuit board 1 are added in adders 18a, 18b, and 18c, respectively, and output from these adders 18a to 18c. The upper data Aa to Ad of the addresses of the RAM chip groups 4 and 10 are sent to the address comparators 16b to 16.
d. Therefore, each address comparator 16
A to 16d select the RAM chip group 10 corresponding to the upper address data A H0 to A _H3 from the CPU circuit 13. Note that the address comparators 16a to 16d, the adders 18a to 18c, and the head address setting circuit 18 are constituted by the eleventh IC group 8.

Now, if a computer accesses the highest RAM chip group 10 of the groups shown in FIG.
and address data A _L and A _H are output. Here, the address comparators 16a to 16d are configured based on the output upper address data A _H , the address setting circuit 17, and the adders 18a to 18c.
Upper address data of RAM chip groups 4 and 10
Compare Aa~Ad. At this time, since the upper address data A _H is equal to the upper address data Ab of the RAM chip group 10 shown at the top, the chip selection signal Sb is output only from the second address comparator 16b, and the chip selection signal Sb is output from the second address comparator 16b. The RAM chip group 10 becomes active and can be accessed. In this way, by allowing memory to be added to the single circuit board 1, the memory can be added without increasing the number of memory circuit boards, and the memory control circuit and the like can also be configured simply. Further, by separately arranging the RAM chip groups 4 and 10, which serve as memory sections, and the control section, the functions of the circuit board 1 can be easily determined, and maintainability is improved.

<Effects of the Invention> As detailed above, according to the circuit board connection device of the present invention, the auxiliary circuit board is connected to the circuit board through the connector in a superimposed state, so that the user When applied to memory expansion due to differences in processing content, memory can be expanded without providing a new circuit board, the mounting structure can be extremely simplified, and maintainability is improved. Furthermore, since the pair of connectors on the circuit board to which the auxiliary circuit board is to be connected are disposed in a non-parallel manner to each other, there is no possibility that the auxiliary circuit board will be connected to the circuit board incorrectly.

[Brief explanation of the drawing]

Figures 1 to 3 each show an embodiment of the circuit board connection device of the present invention, with Figure 1 being an exploded front view, Figure 2 being a cutaway side view, and Figure 3 being a block diagram of the electrical configuration. , FIG. 4 is a perspective view of a substrate unit to which the present invention is applied. 1... Circuit board, 6a-6c, 7a-7c...
Circuit board connector, 9... Auxiliary circuit board, 1
1, 12...Auxiliary circuit board connector.

Claims (1)

[Scope of Claims] 1. A device for electrically connecting an auxiliary circuit board to a circuit board in a superimposed state, which comprises at least one pair of connectors disposed non-parallel to each other on the surface of the circuit board, and , on the auxiliary circuit board;
A circuit board connection device characterized in that a connector is provided corresponding to each connector of the circuit board to be connected to the connector. 2. The circuit board is provided with mounting areas for connecting a plurality of auxiliary circuit boards, and each mounting area is provided with a pair of connectors arranged in the same shape. The circuit board connection device according to item 1.