Process and apparatus for testing a microprocessor and dynamic r

Details Process and apparatus for testing a microprocessor and dynamic r Process and apparatus for testing a microprocessor and dynamic r

1984-05-09

1986-11-11

Fleming, Michael R.

Excavating

371 21, 365222, G06F 1100

Patent

active

046226680

ABSTRACT:
Process and apparatus for testing a microprocessor and dynamic RAM by a single tester where the microprocessor and dynamic RAM may be on a single card. The process makes the RAM appear static to an external static tester by separate read/write and refresh logic for the RAM. Two different clock generators connect to logic where each clock is selectively connectable to an on-board oscillator or to an external input. Priority logic for gating the refresh logic within a predetermined interval and gating the read/write logic at other times. The process includes three steps of a static logic test, a memory interface test, and, a functional test of the logic and the dynamic RAM. The third step is accomplished by executing a program in the on-card microprocessor. The three steps of the test form a single set of test data.

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