Test mode matrix circuit for an embedded microprocessor core

Details Test mode matrix circuit for an embedded microprocessor core Test mode matrix circuit for an embedded microprocessor core

1995-08-07

1998-03-03

Beausoliel, Jr., Robert W.

Excavating

371 226, 307407, 3241581, G06F 1100, H03K 1780

Patent

active

057245029

ABSTRACT:
A test mode matrix circuit in an integrated circuit switches signal lines internal to the integrated circuit in a manner that allows an embedded microprocessor within the integrated circuit to be fully functionally tested using standard test vectors applied to the integrated circuit, and which allows for debugging the code written for an embedded microprocessor core by connecting an in-circuit emulator (ICE) to the integrated circuit. The test mode matrix circuit operates in a number of mutually exclusive modes, each of which is suitably selected via control signal inputs to the test mode matrix. The test mode matrix circuit couples signals from the embedded microprocessor to the application-specific logic without passing through off-chip drivers/receivers. Multiple microprocessors and corresponding test mode matrices may also be implemented on the same integrated circuit.

REFERENCES:
patent: 4404519 (1983-09-01), Westcott
patent: 4542508 (1985-09-01), Moore
patent: 4764896 (1988-08-01), Freimark et al.
patent: 4947395 (1990-08-01), Bullinger et al.
patent: 4964033 (1990-10-01), Williams
patent: 4975641 (1990-12-01), Tanaka et al.
patent: 5012180 (1991-04-01), Dalrymple et al.
patent: 5049814 (1991-09-01), Walker, III et al.
patent: 5214584 (1993-05-01), Dingee et al.
patent: 5254940 (1993-10-01), Oke, et al.
patent: 5304860 (1994-04-01), Ashby et al.
patent: 5331571 (1994-07-01), Aronoff et al.
patent: 5339262 (1994-08-01), Rostoker
patent: 5347181 (1994-09-01), Ashby et al.
patent: 5381530 (1995-01-01), Thayer et al.
patent: 5404359 (1995-04-01), Gillenwater et al.
patent: 5477545 (1995-12-01), Huang

Affiliated with

Also associated with

Rating

Test mode matrix circuit for an embedded microprocessor core does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Test mode matrix circuit for an embedded microprocessor core, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Test mode matrix circuit for an embedded microprocessor core will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2257201