JPH0723990Y2 - Printed circuit board mounting structure for input/output processing device - Google Patents

Description

[Detailed description of the invention] [Summary] This invention relates to a printed circuit board mounting structure for an input/output processing device which is connected to many types of peripheral devices in a computer system to perform signal processing and control of the peripheral devices, and aims to provide a printed circuit board mounting structure for an input/output processing device which can easily accommodate an increasing variety of peripheral devices. One side of a motherboard is used as a mounting surface for an input/output daughterboard which has a circuit configuration consisting of only an input/output section, and the other side is used as a mounting surface for a processing daughterboard which drives the input/output section, and the processing daughterboard and input/output daughterboard are connected via a group of pin terminals attached to the motherboard.

This invention relates to a printed circuit board mounting structure for an input/output processing device which is connected to various types of peripheral devices in a computer system and performs signal processing and peripheral device control.

In recent years, as computer systems have become larger and more versatile, the number and types of peripheral devices connected to input/output processing units have also increased.
Flexibility is also required in interfacing with peripheral devices.

[Prior Art] In general, an input/output processing device (transfer device) in a computer system is composed of an input/output unit that connects to peripheral devices, and a processing unit centered on a channel control device that selects and starts a channel device incorporated in the input/output unit. Conventionally, the input/output unit and the processing unit have been integrated into a single daughter board 8.
As shown in FIG. 4, the motherboard 1 is mounted on the board and is mounted by plugging in a connector 80 to a group of pin terminals 4 provided on the motherboard 1.

[Problem that the invention aims to solve] However, the daughter board 8 in the above conventional example is configured on a substrate within 1 with input/output sections and processing sections corresponding to specific peripheral devices, and since it is in roughly one-to-one correspondence with the peripheral devices to be connected, it was necessary to design and manage several types of boards depending on the combination of peripheral devices, resulting in a problem of wasted design labor and inventory management.

The present invention has been made to solve such problems, and has as its object to provide a printed circuit board mounting structure for an input/output processing device that can easily accommodate a wide variety of peripheral devices.

[Means for solving the problem] According to the present invention, the above object is achieved by providing a printed circuit board mounting structure for an input/output processing device, characterized in that one side of a motherboard is used as a mounting surface for an input/output daughterboard having a circuit configuration only for input/output sections, and the other side is used as a mounting surface for a processing daughterboard that drives the above-mentioned input/output sections, and the above-mentioned processing daughterboard and input/output daughterboard are connected via a group of pin terminals implanted in the motherboard.

[Action]

Processing unit B in the input/output processing device is mainly composed of a channel control device which transmits and receives control signals and data to and from the logical device and main memory device, and transmits and receives data to and from the channel device of input/output unit A, which will be described later. Its specific configuration is uniquely determined by the specifications of the computer system, and there is very little change in configuration due to differences in the peripheral devices to be connected.

In contrast, input/output unit A is highly susceptible to the effects of differences in peripheral devices; for example, differences in the connector shape of the peripheral devices to be connected or differences in data transfer speeds may require the connector shape to be changed accordingly, or the channel device to be appropriately selected and used as a selector channel or a multiplexer channel.

The present invention has been made with attention to such a fact, and a processing section B, which is considered to be a common section in an input/output device,
A processing daughterboard 3 carrying the above-mentioned is mounted on one side of a motherboard, and an input/output daughterboard 2 consisting only of an input/output section A which includes many variable elements due to peripheral devices is mounted on the other side, thereby enabling changes in the peripheral devices to be accommodated by changing only the input/output section A.

[Example]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a motherboard, and a plurality of pin terminal groups 4, 4, . . . are arranged vertically on the motherboard 1.
・ is attached protruding from both sides.

The input/output device in this embodiment is constructed as a single unit of an input/output daughterboard 2 and a processing daughterboard 3, which face each other via a motherboard 1. The processing daughterboard 3 is equipped with a motherboard-side connector 30 that is plugged into the pin terminal group 4 of the motherboard 1 described above, and elements 31 that mainly constitute a channel control device.

On the other hand, the input/output daughterboard 2 is equipped with motherboard side contacts 30, for example, arranged with the contacts reversed from those on the processing daughterboard 3 in order to correspond to the signals of the processing daughterboard 3, an external interface connector 20 for connecting an interface cable 9 of a peripheral device, and elements 31 which are selected by a signal from a channel control device of the processing daughterboard 3 and constitute a plurality of channels for driving a specified peripheral device. The input/output daughterboard 2 and the processing daughterboard 3 are
The pin terminal group 4 of the motherboard 1 is shared between the two boards and is mounted on both sides of the motherboard 1 .

The input/output processing device is constructed by arranging a plurality of input/output processing device units configured as described above in a line perpendicular to the plane of the drawing, with only the input/output daughterboard 2 mounted on one side of the motherboard 1 and only the processing daughterboard 3 mounted on the other side, i.e., with one side of the motherboard 1 serving as the mounting surface for the input/output daughterboard 2 and the opposite side serving as the mounting surface for the processing daughterboard 3, and is electromagnetically shielded by a front shield structure 21 including the external interface connectors 20 of each of the input/output daughterboards 2, 2...

Therefore, according to this embodiment, even if there are a wide variety of peripheral devices, the input/output daughter board 2 can be used to accommodate them.
Only the input/output daughter board 2 needs to be prepared, which saves the trouble of new design and also makes it possible to deal with changes in peripheral devices by simply changing the input/output daughter board 2, thereby dramatically improving the flexibility of the system.

FIG. 2 shows another embodiment of the present invention, in which the input/output daughter board 2 is made up of four sub-printed boards for each peripheral device.
In this way, by dividing the input/output daughter board 2 so that it corresponds one-to-one with the peripheral devices, it is possible to respond to changes in the peripheral devices by changing only the sub-printed boards 2a, 2b, 2c, and 2d.
By simply preparing 2b, 2c, and 2d, it is possible to accommodate a wide variety of peripheral devices. Fig. 3 shows yet another embodiment of the present invention, which shows a structure that is effective when wiring the discrete wire 6.

That is, in this embodiment, when the motherboard 1 is remodeled, when an interrupt is processed, or when it is necessary to connect the pin terminal groups 4 with the shortest wiring length to prevent signal delay, the discrete wires 6 that are laid out to connect the pin terminal groups 4, 4, ... are concentrated, and the discrete wires 6
This is effective in cases where there is a risk of contact between the motherboard connector 30 of the daughter board 2, 3 and the motherboard connector 30 of the daughter board 2, 3. The discrete wires 6 are concentrated on one surface of the motherboard 1 as a discrete wire wiring surface 5, and the discrete wires 6 thus arranged are supported by a plate-shaped spacer 7 set at a predetermined distance from the motherboard 1.
Therefore, the side of the pin terminal groups 4, 4, ... opposite the discrete wire wiring surface 5 protrudes by a length 11 necessary for plugging in the motherboard connector 30 of the daughter board, but the side of the discrete wire wiring surface 5 protrudes by an amount obtained by adding a length 12 including the wire wiring area and the thickness of the spacer 7 to the length 11, and thus the length 12 is longer than the length 11 required for plugging in the motherboard connector 30 of the daughter board.
The plug-in will also be secure.

Therefore, according to this embodiment, after the necessary discrete wires 6 are laid out on the discrete wire laying surface 5 of the motherboard 1, the spacers 7 are attached to prevent the discrete wires 6 from sticking out. Then, as in the above-mentioned embodiment, the motherboard side connectors 30 of the input/output daughterboard 2 and the processing daughterboard 3 are fitted into each pin terminal group 4 to establish electrical continuity between the necessary circuits.

As a result, abnormal contact between the discrete wires 6 and the daughter board can be completely prevented, the motherboard side connector 30 of the daughter board can be reliably fitted, and since the discrete wires 6 are laid out on only one side of the motherboard 1, there is no need for the troublesome task of laying the discrete wires 6 on the front and back sides of the motherboard 1 via through holes in the motherboard 1, improving the ease of laying the wires.

[Effects of the Invention] As is clear from the above explanation, according to the printed circuit board mounting structure of the input/output processing device of the present invention, the input/output section and processing section of the input/output processing device are configured on separate daughter boards, so that it is possible to accommodate various peripheral devices simply by adapting the input/output daughter boards, thereby improving the flexibility of the system.

Furthermore, since the input/output daughter boards are concentrated on one side of the motherboard, changes after mounting can be easily accommodated.

Furthermore, since the input/output daughter boards and processing daughter boards which are mounted on both sides of the motherboard to constitute the input/output processing device have many terminals in common compared to unrelated boards, the pin terminal groups of the motherboard can be effectively shared, thereby improving the mounting efficiency of the daughter boards.

[Brief description of the drawings]

Fig. 1 shows an embodiment of the present invention, Fig. 2 shows another embodiment of the present invention, Fig. 3 shows yet another embodiment of the present invention, Fig. 3(a) shows the whole embodiment, Fig. 3(b) shows an enlarged view of the main part, Fig. 4 shows a conventional example. In Fig. 1, 1 ... mother board, 2 ... input daughter board, 3 ...
. . processing daughter board, 4 . . . pin terminal group, A . . . input/output section.

Continued from the front page (72) Inventor Yoshinori Uzuka 1015 Kami Odanaka, Nakahara-ku, Kawasaki-shi, Kanagawa-ken Fujitsu Ltd. (72) Inventor Takayoshi Inoue 1015 Kami Odanaka, Nakahara-ku, Kawasaki-shi, Kanagawa-ken Fujitsu Ltd. (72) Inventor Yoshinobu Maeno 1015 Kami Odanaka, Nakahara-ku, Kawasaki-shi, Kanagawa-ken Fujitsu Ltd.

Claims (2)

[Scope of utility model claims] [Claim 1] A printed circuit board mounting structure for an input/output processing device, characterized in that one side of a motherboard (1) is used as a mounting surface for an input/output daughterboard (2) having a circuit configuration consisting only of an input/output section (A), and the other side is used as a mounting surface for a processing daughterboard (3) that drives the input/output section (A), and the processing daughterboard (3) and the input/output daughterboard (2) are connected via a group of pin terminals (4) implanted in the motherboard (1). [Claim 2] Any one of the mounting surfaces is used as a discrete wire wiring surface (5), and discrete wires (6) connecting between pin terminal groups (4, 4...) are concentrated and wired,
The discrete wire (6) is placed in a plate-shaped spacer (7).
2. The printed circuit board mounting structure for an input/output processing device according to claim 1, wherein said printed circuit board is detachably covered with a cover.