JP2543611B2 - Data input / output control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] Regarding a data input / output control device, efficient data input / output when the number of data input / output points in a data processing means such as a personal computer is smaller than the number of data input / output points on the target side. A device for exchanging data between the data processing means and the target, wherein the number of data input / output points of the data processing means is smaller than the number of data input / output points of the target. The number of input / output points on the side is divided into a plurality of groups, and each group is sequentially selected by the selecting means driven based on the information from the data processing means, and the selected one group. And the input / output points of the data processing means are connected to each other at the selected time. To configure.

[Industrial applications]

The present invention relates to a data input / output control device in data processing means such as a personal computer.

[Conventional technology]

In the conventional data processing means such as a personal computer, when connecting a parallel I / O interface with an external device, an option card or the like is attached to a user-usable I / O space, that is, an address area, and the parallel I / O interface is provided. I was going.

However, when the I / O space area is small, the number of option cards that can be inserted is limited, and when it is necessary to connect to a large number of input / output terminals, it cannot be handled as it is. For example, in order to connect one personal computer to 100 or more input / output terminals, another means had to be introduced. In the past, as a method for solving such a problem, an interface was taken by interposing a programmable controller also called a sequencer. With this method, a program is introduced into the programmable controller to exert the switch function and to increase the number of input / output terminals at the time of circuit, but this method requires the use of the programmable controller excessively and the cost is high. In addition, it takes time and cost to develop the program, and there is a drawback that the cost becomes higher.

Further, in such a method, there are problems that the system configuration is complicated and that it takes time to exchange data between the personal computer and the attached device.

Further, in such a conventional method, considering only a switch function for increasing the number of input / output terminals even though a complicated operation can be performed, using a programmable controller with a built-in personal computer is There was a risk of over-spec.

[Problems to be Solved by the Invention]

The object of the present invention is to improve the drawbacks of the prior art and to provide a simple structure for data between one data processing means and a controlled object (object) having more input / output points than the data processing means. A data input / output control device capable of performing input / output control inexpensively and at high speed.

[Means for solving the problem]

The present invention employs the following technical configurations in order to achieve the above object. According to the present invention, a device for exchanging data between the data control means and the target, wherein the number of data input / output points of the data processing means is smaller than the number of data input / output points of the target, The number of input / output points on the side is divided into multiple groups, and each flip-flop IC writes data for 8 points and writes the group number (IC address), so that the demultiplexer group IC Is selected and data is set in the flip-flop, the data setting process for groups is sequentially repeated, and the input / output points of the selected one group and the input / output points of the data processing means are respectively Are configured to be connected to each other at the selected time. An input / output controller is provided.

That is, in the present invention, the I / O space area in the data control means such as a personal computer, that is, the area to which the option card can be connected, can be expanded in a circuit without using the option card.

[Work]

In the present invention, the number of input / output terminals provided on the controlled object side (hereinafter referred to as "object") is divided into a plurality of groups, and the number of points of each group is divided for data input / output control on the data processing means, for example, the personal computer side. The number of input / output terminals that can be attached is the same as that of the input / output terminals, or if necessary, at least some of the groups are configured to have a smaller number of points than that of the above groups. One input / output terminal and an input / output terminal of the data processing means are electrically connected by a selector and a selection means including a flip-flop or a buffer provided in each group to input / output data. is there. Then, this operation is sequentially switched between the input / output terminals of the data processing means and the respective groups of the input / output terminals of the target side which are divided by appropriately switching the selecting means. The problem when the number of terminals is larger than the number of data input / output terminals of the data processing means can be easily solved.

〔Example〕

A specific example of the data input / output control device according to the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing an outline and a principle of a system in which a data input / output control device according to the present invention is actually applied,
Specifically, the data processing means 1 including a personal computer or the like is used to measure a characteristic value of an object 2 having a large number of measured points such as temperature characteristics and electrical characteristics, for example, each measured point of a CCM temperature tester or the like. An example in which the data input / output control device 3 according to the present invention is used as an interface in this case is shown. Normally, the number of input / output terminals in the I / O space area of a personal computer is 8 or 1
There are restrictions depending on the model, such as 6 or 32,
On the other hand, the number of data input / output terminals on the object side 2 is usually 100 or more.

In FIG. 1, a dummy substrate 5 on which a large number of heat sinks 6 corresponding to LSIs are mounted is used to measure the heating characteristics and cooling characteristics of a large number of LSIs arranged on a substrate. Each of them is connected to a heater 20 capable of generating a heat quantity equivalent to that which is considered to be generated while the LSI is being driven, and each heater 20 is turned on and off by a data control device described later.

Temperature characteristics of each heat sink 6 after turning on the heater or each heat sink 6 after turning off the heater 20
Data of the cooling characteristics of is set at an appropriate time interval, for example, 1
Every ten minutes, for example, a thermocouple attached to the heater is used to pick up using a temperature sensor or the like and is recorded in a memory 7 called a data logger.

After that, the data logger 7 is instructed by the data processing means 1.
The information recorded in (1) is appropriately taken up by the data processing means 1 and the necessary arithmetic processing is executed.

In such a specific example, for example, I / I of the data processing means 1
It is assumed that the number of points assigned to data input / output in the O space area is 8 and the number of data input / output terminals on the object 2 side is 144.

Since the data input / output control device 3 according to the present invention executes the interface in the above situation, the switching device is utilized to increase the input / output terminals for connection in a circuit manner. Specifically, the number of data input / output points on the object side is divided into a plurality of groups (A, B, C ... N), and the number of points in each group is the same as the number of data input / output points of the data processing means 1. The means 9 configured as described above and one of the divided groups are selected, and the input / output terminals in the group and the input / output terminals of the data processing means 1 are temporarily connected to exchange necessary data. , And then selects another group to perform the same processing. It is preferable that each of the groups (A, B ... N) in the present invention have the same number of input / output points, but a fraction may occur in relation to the number of input / output points of the data processing means. Or
The number of data input / output terminals may be different from that of other groups, but the number is preferably smaller than the number of data processing means.

Further, in the present invention, the selecting means 10 realizes the switching process by the demultiplexer element, is connected to the data processing means 1, and is divided into groups (fourth group) based on the information from the data processing means 1. (See the drawing) are sequentially and selectively connected.

The selection means is the group construction means 9 in the present invention.
A control circuit (A, B, C ... N) actuated based on the signal from 10 is provided with, for example, a flip-flop, an enable buffer or the like, and further the flip-flop (FF-A, FF-B , FF-C ... FF-N) and the input / output terminal 13 of the object are preferably provided with an isolated level converter 14. This is because the power source for driving the data processing means 1 such as a personal computer is about 5V, whereas the power source for driving the measuring means in the object 2 is DC.
It may be 24V or AC 100V, and is used because it is necessary to insulate between the two.

Next, a specific example of the configuration of the data control device 3 in the present invention will be described with reference to FIG.

In FIG. 2, of the input / output terminals 12 in the I / O space area 11 of the personal computer 1, eight terminals 121 are assigned for data input / output.

Also, the next eight terminals 122 are assigned as selector bits for circuit switching.

Of the other terminals, for example, the terminal 123 is assigned to the WRITE clear and the terminal 124 is assigned to the WRITE latch. On the other hand, the data input / output terminal 13 of the object 2 is divided into eight groups (131, 132, 133 ... 13n) and flip-flops (FF-A, FF-B ... FF) are provided to the respective groups via the isolation level converter 14. -N). Each of the flip-flops (FF-A, FF-B ... FF-N) has eight input / output terminals. The other terminal of each flip-flop (FF-A, FF-B ... FF-N) is a data input / output terminal on the data processing means 1 side.
It is connected to 121. As the flip-flop, for example, 74 LS 273 can be used. On the other hand, the enable terminal E of the flip-flops (FF-A, FF-B ... FF-N) is one of the signal output terminals (101, 102 ... 10n) of the data selector 10 connected to the data input / output terminal 122 of the data processing means. Connected to each one. Such a data selector is
Also called demultiplexer, for example 74 LS 13
8 etc. can be used.

Further, each of the above flip-flops (FF-A, FF-B ... FF-N)
The clear terminal C and the latch terminal L are connected to the terminals 123 and 124 of the data processing means 1 described above, respectively. Therefore, the selector 10 is sequentially switched by the signal of the select bit 122 of the data processing means 1 and divided into blocks (FF-A,
FF-B ... FF-N) can be sequentially connected to exchange data.

Next, the operation of the data input / output control device of the present invention will be described with reference to FIGS. 1 and 2.

When it is desired to heat 144 heaters 20 provided on each heat sink 6 in the object 2 shown in FIG. 1, the heating circuit of the heater 20 is a solenoid switch 21 driven by 24V DC as shown in FIG. The solenoid switch 21 heats the heater 20 via the switch 13 which is turned on / off by a signal from the data bit 121 of the data processing means 1. You can prevent it from heating.

The circuit shown in FIG. 3 is also called a solid state relay (SSR). This may be the structure of the isolated level converter 14 described above.

Therefore, in the present invention, depending on the chip used to measure the temperature characteristic of the heat sink 6, the LSI may not be present at all the positions of the heat sink, and the LSI may not be mounted on the specific heat sink 6. is there. The If and then enter the drawing information to the data processing unit 1 such as a personal computer, the heater should be set to information indicating that deactivated in the heat sink in advance which address.

After the above data is set in the data processing means, the select bit is activated to turn on the pin 101 of the selector 10 to enable the flip-flop A for controlling the group 131 of input / output terminals on the object side, and to enable the flip-flop A of the data processing means 1. Information at an address corresponding to the group 131 of input / output terminals on the object side by connecting to the data bit 121 is input to the flip-flop FF-A and latched therein.

At this time, the address of the heat sink that needs to heat the heater and the address of the heat sink that does not require heating are naturally included in the latched information. Next, the select bit is incremented by one, and the output 102 of the selector 10 is turned on to flip-flop FF-B.
Is enabled and the same data processing as above is performed, and this is repeated for all flip-flops.

After setting the necessary information in all the flip-flops in this way, the information set in all the flip-flops is simultaneously output by turning on the WRITE latch terminal 124, and the solenoid coil in the necessary heat sink is output. The temperature characteristic is measured by heating 20 at the same time. Note that FIG. 3 shows an example in which information is supplied from the data processing means 1 to the object, and therefore the flip-flop (FF
-A, FF-B ... FF-N) has been shown, conversely, when the information on the object side is directly read into the data processing means 1, the flip-flop (FF-A, FF-A, FF-B ... FF-N) enable buffer (FF
-A ', FF-B' ... FF-N '), and other circuit configurations may be the same as in FIG.

FIG. 4 shows a concrete circuit for controlling a large number of objects with a small number of input / output points. A schematic circuit diagram and a control procedure will now be described.

In FIG. 4, the personal computer 1 has data bits (1 to 8)
And clocks for control bits (9 to 16). Inventive part 3 consists of two demultiplexers (4 inputs 74
154 and 3 inputs 74138) and 21 logic elements (74273
(1) to 74273 (21)), each logic element is 8
Includes 4 flip-flops (Octal D-FFs).

The target object 2 is composed of 168 controlled parts (for example, heaters), and eight heaters represent one group (indicated by a broken line). In this figure, one square is a heater, a black square indicates heater ON, and a white square indicates heater OFF. This heater control is for module test of the LSI control process, for example. Therefore, it is possible to control 168 objects (heaters in this embodiment) with a personal computer having 16 input / output points.

The control procedure in the apparatus of FIG. 4 is carried out in the following process.

Control procedure 1 to 8 data bits among 16 bits of personal computer,
9 to 13 are used as control bits.

Assign each heater to 8 groups,
One flip-flop (74273) containing 8 elements.

Data for 5 heaters in group (1) 8F _HEX (16
Set the decimal number to 1 to 8 bits.

Set 01 _HEX to bits 9 to 13 to output the select (latch) signal for group (1).

Set 00 _HEX to 9th to 13th bits. No selection.

The output data of the heater is set in the flip-flop (1).

Similarly, data for 8 heaters in group (2)
Set FF _HEX to 1 to 8 bits.

Set 02 _HEX to bits 9 to 13 to output the select (latch) signal for group (2).

Set 00 _HEX to 9th to 13th bits. No selection.

The output data of the heater is set in the flip-flop (2).

In this manner, the data for each group is set in order, and the flip-flops of the group are accessed to set the data of the 21-point group.

The actual circuit has an all-clear function of flip-flops and a gate circuit for simultaneous output of the set heat generation point data.

[Effect]

Since the present invention is configured as described above, the data between one data processing means and the controlled object (object) having the input / output points larger than the input / output points of the data processing means can be provided with a simple configuration. A data input / output control device that can execute input / output control at low cost and at high speed is obtained.

[Brief description of drawings]

FIG. 1 is a diagram illustrating one specific example of a system to which the data input / output control device according to the present invention is applied and the principle of the present invention. FIG. 2 is a diagram showing a specific circuit configuration of the data input / output control device according to the present invention. FIG. 3 is a diagram showing an example of a heater heating circuit used in one embodiment of the present invention. FIG. 4 is a schematic diagram showing a specific configuration of the circuit of FIG. 2 as an embodiment of the present invention. 1 ... Data processing means, 2 ... Controlled object (object), 3 ... Data input / output control device, 5 ... Dummy substrate, 6 ... Heat sink, 7 ... Memory, data logger, 9 ... Dividing configuration means , 10 …… selecting means (selector), 11 …… I / O space area, 12,121,122,123,124 …… input / output terminals, 13,131,132… 13n …… object side input / output terminals, 14 …… isolated level converter, 20 …… heater, 21 …… Solenoid switch, 22 …… Changeover switch.

Claims (4)

(57) [Claims] 1. A device for exchanging data between a data control means and a target, wherein the number of data input / output points of the data processing means is smaller than the number of data input / output points of the target. The number of input / output points is divided into a plurality of groups, and each flip-flop IC writes data for 8 points and writes the group number (IC address). By the method of selecting and setting the data in the flip-flop, the data setting process for the groups is sequentially repeated, and the input / output points of the selected one group and the input / output points of the data processing means are respectively set. Data entry characterized by being configured to connect to each other at selected times Output control device. 2. The data input according to claim 1, wherein the number of input / output points in one group of the targets divided into a plurality of groups is the same as or smaller than the number of input / output points of the data control means. Output control device. 3. A data holding function is activated by hitting a clock of a latched flip-flop means (for example, Octal D-flip-flop) on each of the input / output point groups divided into a plurality of groups in the target.
The data input / output control device according to claim 1. 4. The data input / output control device according to claim 1, wherein each of the input / output point groups divided into a plurality of groups in the target is provided with enable buffer means.