JPS6216693Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an evaluation aid package.

In general, in devices including large-scale logic circuits such as computers, errors in logic at the design stage and connection errors at the manufacturing stage are unavoidable to some extent. If the above-mentioned error is found in a certain part during the inspection and evaluation stage, it is not possible to continue the inspection and evaluation of other parts, which requires that part to operate normally. Therefore, in the past, inspections and evaluations were continued after making partial corrections for parts where errors were discovered, but this was extremely inefficient, especially for logic packages with high packaging density such as recent logic packages. There is a drawback that it takes a very long time to modify the board or change the connection of a part where a large number of electric wires are connected to a small connector, and therefore a long period of time is required for inspection and evaluation.

The purpose of this invention is to eliminate the defects found in the conventional inspection and evaluation stage, temporarily correct errors found during the inspection and evaluation stage on the spot in a short time, and continue the next stage of inspection and evaluation without any problems. The object of the present invention is to provide an evaluation support package that can shorten the period required for evaluation.

The package of the present invention includes a front side connector connectable to a backboard provided on the main body side of a device including a logic package, a board, and a rear side connector connectable to the logic package. a switching circuit having a structure that can be inserted between the first and second switching circuits and selecting and outputting either logic "1" or "0";
an exclusive OR circuit, the input terminal of which is connected to the logic input terminal of the front connector, the second input terminal of which is connected to the output of the switching circuit, and the output terminal of which is connected to the rear connector. A jumper that connects a set of input logic inverting means, a front side terminal group consisting of a plurality of terminals, and a rear side terminal group consisting of the same number of terminals as the front side terminal group in any combination by jumper wires. A connection circuit is provided on the board, and a connection circuit is provided between the output terminal of the exclusive OR circuit and the rear connector, or between the front connector and the first of the exclusive OR circuit.
and input logic switching means connected between the input terminals of the input terminal.

Next, the present invention will be explained in detail using the drawings.

FIG. 1 is a circuit diagram of an embodiment of the present invention. The evaluation support package in this example includes a front connector 1 including m logic input terminals 1-1 to 1-i to 1-m corresponding to m logic inputs (m is a positive integer), and m logic input terminals 1-1 to 1-i to 1-m. Logic output terminals 3-1 to 3-i to 3
-m rear side connector 3 and m exclusive OR circuits (hereinafter referred to as EX-OR circuits) 4-1 to
4-i to 4-m, m switching circuits 5-1 to 5-i to 5-m each composed of m switching switches,
m front side terminals 6-1a ~ 6-ia ~ 6-ma
and a jumper connection circuit 6 including a front side terminal group and a rear side terminal group consisting of m rear side terminals 6-1b to 6-ib to 6mb, an inverter 7, and an input terminal 8 of logic "1". , logic input terminals 1-1 to 1-i to 1-m are EX-OR circuit 4-1
~4-i ~ connected to the first input terminal of 4-m,
The second input terminals of the EX-OR circuits 4-1 to 4-i to 4-m are connected to the switching circuits 5-1 to 5-i to 5-m, and input from the logic "1" input terminal. switching circuits 5-1 to 5-i to select either “1” output from the inverter 7 or “0” output from the inverter 7
Connected to 5-m, EX-OR circuit 4-1 to 4-i
~4-m output is from front side terminal 6-1a ~ 6-ia
~ Connected to 6-ma, rear terminal 6-1b
6-ib to 6-mb are connected to logic output terminals 3-1 to 3-i to 3-m included in the rear connector 3.

Next, the operation of this embodiment will be explained.

First, in a state where no error in logic or connection between input logics is found, all switching circuits 5-1 to 5-i to 5-m are set to "0" as shown in FIG.
EX-OR circuit connected to the side 4-1 ~ 4-i ~ 4-
Since the logic “0” is input to the second input terminal of the input of m, the logic input terminals 1-1 to 1-i to 1
The logic "1" or "0" given to -m becomes the output of the EX-OR circuits 4-1 to 4-i to 4-m as is, and in the jumper connection circuit 6, the front side terminals 6-1a to 6- ia~6-ma and rear side terminal 6-
1b to 6-ib to 6-mb have jumper wires 6-1c between the corresponding terminals as shown in Figure 1.
Since they are connected by ~6-ic ~6-mc
The outputs of the EX-OR circuits 4-1 to 4-i to 4-m directly become the outputs of the logic output terminals 3-1 to 3-i to 3-m. Therefore, the logic output terminals 3-1 to 3-
i to 3-m have logic input terminals 1-1 to 1-i to 1
A logic equal to the logic input to -m will be output, and even if this evaluation auxiliary package is inserted between the backboard and the logic package, there will be no change in the logic output to the logic package. I won't give it.

Next, when a logic "1" or "0" error is found at the logic input terminal 1-i, the switching circuit 5-i is switched to the logic "1" side.
The EX-OR circuit 4-i operates as an inverter according to a well-known operating principle, and outputs a logic "0" or "1" which is the inversion of the logic "1" or "0" input to the logic input terminal 1-i. The output is given to the logic output terminal 3-i through the front terminal 6-ia, the jumper wire 6-ic, and the rear terminal 6-ib. Therefore, the logic error at the input terminal 1-i is temporarily corrected, and it becomes possible to continue the next stage of inspection and evaluation.

Next, the input logic may be swapped due to an error in the connection between the input logics, and the logic input terminals 1-1 and 1-i
If it is found between the front terminal 6-1a and the rear terminal 6 in the jumper connection circuit 6.
-1b and front terminal 6-ia and rear terminal 6
Jumper wires 6-1c and 6-ic connecting -ib
, and instead connect the front side terminal 6-1a and the rear side terminal 6-ib and the front side terminal 6-ia and the rear side terminal 6-1b with jumper wires to correct the connection error between the input logics. will be in a temporarily corrected state, allowing the next stage of inspection and evaluation to continue. FIG. 2 is a plan view showing the circuit of the embodiment shown in FIG. 1 mounted on a board.

This evaluation auxiliary package includes a front connector 1 connectable to a backboard provided on the main body side of the device including the logic package, a board 2, and a front connector 3 connectable to the logic package. It has a structure that can be inserted between the backboard and the logic package.

The case where the jumper connection circuit is provided between the EX-OR circuit and the logic output terminal has been described as an embodiment of the present invention, but it is also possible to provide the jumper connection circuit between the logic input terminal and the EX-OR circuit. It is clear that the functions of the evaluation support package of the present invention are exactly the same in both cases, and further details can be modified by providing a jumper with a pin for changing the connection in place of the changeover switch composing the changeover circuit shown in Figure 1. It is also possible to increase the packaging density by changing connections using wires, and by providing an input terminal for logic "0" without using an inverter to obtain logic "0" as shown in Figure 1. The configuration may be such that logic "0" is obtained from an external circuit.

As explained in detail above, the evaluation support package of the present invention is used to test and evaluate devices including large-scale logic circuits such as computers, and to detect partial logic errors and connection errors between logic inputs that are discovered during the evaluation stage. This has the effect of shortening the period required for inspection and evaluation by temporarily correcting the problem using a simple method and continuing with the subsequent inspection and evaluation.

[Brief explanation of the drawing]

Figure 1 is a circuit diagram of one embodiment of the present invention and a circuit diagram of an embodiment of the invention.
This figure is a plan view showing a state in which the circuit according to the embodiment shown in FIG. 1 is mounted on a substrate. In the figure, 1...Front side connector, 1-
1~1-i~1-m...logic input terminal, 2...board, 3...rear side connector, 3-1~3-i~3
-m...Logic output terminal, 4-1 to 4-i to 4-m
...EX-OR circuit, 5-1~5-i~5-m...
Switching circuit, 6...Jumper connection circuit, 6-1a~6
-ia~6-ma...Front side terminal, 6-1b~6
-ib ~ 6-mb...Rear side terminal, 6-1c ~ 6-ic
~6-mc... jumper wire, 7... inverter,
8...Logic "1" input terminal.

Claims (1)

[Claims for Utility Model Registration] (1) A front side connector that can be connected to a back board provided on the main body side of the device including a logic package, a rear side connector that can be connected to the logic package, and a logic “1” or A switching circuit that selects and outputs either "0" and a first input terminal are connected to one of the logic input terminals of the front connector, and a second input terminal is connected to the output of the switching circuit. and an exclusive OR circuit whose output terminal is connected to one of the output terminals of the rear connector. An evaluation aid package characterized by having a structure that can be inserted between. (2) between the plurality of logic input terminals of the front connector and the first input terminal of the exclusive OR circuit, or between the output terminal of the exclusive OR circuit and the plurality of output terminals of the rear connector; The evaluation assistance package according to claim (1) of the utility model registration, characterized in that the two are connected via jumper wires that can be changed in connection.