JPH02101544A - Extension function board - Google Patents

Abstract

PURPOSE:To facilitate analysis from the reciprocal relation of hardware and software by providing a circuit setting the conditions of plural signals with respect to an external trigger input signal. CONSTITUTION:A condition setting switch 6 sets the conditions with respect to one signal. When the jumper of the switch 6 is set in the position of a first jumper switch 6a, the signal becomes invalid with respect to a trigger condition. When it set in the position of a second jumper switch 6b, the signal becomes valid when it becomes L for the trigger signal. When it is set in the position of a third jumper switch 6c, it becomes valid when it is in H. Respective signals generated in the trigger condition setting circuit 3 are inputted to an AND circuit 4, and a signal output pin 5 becomes H when all input signals are H. ICE (in-circuit emulator) or the like fetch signals from the signal output pin 5 into an external trigger input line, and set the conditions for executing a program with setting H to be the external trigger condition.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an extended function board used in OA equipment and the like.

[Conventional technology]

Conventionally, this type of expansion function board extends each signal on the expansion path as it is and outputs it to a connector section or the like.

[Problem to be solved by the invention]

In the conventional expansion function board mentioned above, the signal on the expansion path is extended and output as is, so the In-C
Using an external trigger input such as a 1reult Imulator (hereinafter referred to as ICE)... - When analyzing or evaluating hardware or software, program execution can be interrupted with one signal condition, but it is not possible to interrupt program execution with multiple signal conditions. I can't do it without interruption. Therefore, when analyzing the interrelationship between hardware and software,
Since the path relationship between special Kas and software requires interruptions under multiple signal conditions, it has been difficult to analyze with conventional expansion function boards.

[Means to solve the problem]

The extended function board of the present invention was created in view of the above-mentioned conventional problems), and includes a trigger condition setting circuit including jumper switches for setting conditions for each external trigger input signal on the trigger signal generation board. , and an AND circuit that changes the output signal when all conditions are met and the device dies.

[Effect]

In the present invention, multiple signal conditions can be set for the external trigger input.

〔Example〕

Next, the present invention will be explained with reference to the drawing board.

FIG. 1 is a plan view showing the configuration of an extended function board according to an embodiment of the present invention. In the figure, 1 is a trigger signal generation board, 2a to 2ntf external trigger signal input terminals, 3
4 is a trigger condition setting circuit, 4 is an AND circuit, and 5 is a signal output pin.

FIG. 2 shows an example of the trigger condition setting circuit 3 for the trigger input signal SK. A condition setting switch 6 having two jumper switches 6b and a third jumper switch 6C is connected.

In the extended function board configured in this manner, conditions for L1 signals are set by the condition setting switch 6. When the jumper setting of the condition setting switch 6 is set to the first jumper switch 6a, the signal becomes invalid for the trigger condition. Also, when the second jumper switch 6b is set to the position, the signal is valid when it is at a low level in response to the trigger condition, and when the third jumper switch 6c is set to the position, the signal is valid when it is at a high level. becomes. Each signal generated by the trigger condition setting circuit 3 is input to the AND circuit 4, and when all the input signals are at the no-y level, the signal output pin 5 becomes high level. Further, the ICE etc. can take in the signal from the signal output pin 5 to the external trigger input line, and interrupt the program execution by using an irregularity as an external trigger condition.

〔Effect of the invention〕

As described above, the present invention has the effect of facilitating analysis from the mutual relationship between hardware and software, since conditions for a plurality of signals can be set for external trigger input such as ICE.

[Brief explanation of drawings]

FIG. 1 is a plan view of an extended function board of the present invention, and FIG. 2 is an example of a trigger condition setting circuit. 1...Trigger signal generation board, 21~2n...
Input signal terminal, 311... trigger condition setting circuit, 4a
...AND circuit, 5...Trigger signal output bin, 6
...Condition setting switch, 6at6b+6c...
・Jumper switch.

Claims (1)

[Claims] The trigger condition setting circuit has a jumper switch for setting conditions for each external trigger input signal on the trigger signal generation board, and an AND circuit that changes the output signal when all conditions are met. Extension function board.