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At-speed testing of delay faults for Motorola's MPC7400, a PowerPC TM microprocessor

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4 Author(s)
Tendolkar, N. ; Motorola Inc., Austin, TX, USA ; Molyneaux, R. ; Pyron, C. ; Raina, R.

In this paper we present the novel built-in delay fault test concepts incorporated into Motorola's MPC7400 PowerPC microprocessor that allow us to use a slow speed tester to do at-speed, scan based, delay fault testing. A novel feature of the design is the programmable clock control circuit for issuing a given number of at-speed clocks for the delay test, once the test is initiated. Using transition and path delay fault test patterns, we have tested several MPC7400 chips at speed exceeding 540 MHz using tester speed of 63 MHz or lower

Published in:

VLSI Test Symposium, 2000. Proceedings. 18th IEEE

Date of Conference:

2000