Microcomputer, has selection circuit to select either...

Details Microcomputer, has selection circuit to select either... Microcomputer, has selection circuit to select either...

2006-04-11

2006-04-11

Perveen, Rehana (Department: 2111)

Electrical computers and digital data processing systems: input/

Interrupt processing

C710S268000, C710S048000, C710S022000

Reexamination Certificate

active

07028123

ABSTRACT:
In a microcomputer, a testing-purpose interrupt request signal generator generates a testing-purpose interrupt request signal, an interrupt request selecting register stores an interrupt request selection signal for making an interrupt request during testing effective, and at least one delay circuit generates one or more delayed interrupt request selection signals obtained by delaying the interrupt request selection signal by one or more delay times. Each of selection circuits selects either one of the interrupt request signals or the testing-purpose interrupt request signal based on the delayed interrupt request selection signal. The testing-purpose interrupt request signals output from the respective selection circuits at a different timing, can be sequentially input to the interrupt controller.

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