Parallel and serial debug port on a processor

Details Parallel and serial debug port on a processor Parallel and serial debug port on a processor

1997-12-19

2000-03-21

Pan, Daniel H.

Electrical computers and digital processing systems: processing

Processing control

Specialized instruction processing in support of testing,...

714 34, 714 38, 395704, G06F 1134, G06F 1128

Patent

active

060414065

ABSTRACT:
A processor has both a serial debug port and a parallel debug port. The processor includes a processor core. The serial debug port is formed of a plurality of pins configured to send and receive signals to and from external software debug equipment. The parallel debug port is formed of a plurality of pins and configured to send and receive signals from external software debug equipment. A plurality of debug registers are accessible to the serial debug port and the parallel debug port. The debug registers are also coupled to the processor core for receiving and providing debug data and control signals. The processor core performs various software debug operations in response to signals from the external software debug equipment sent over one of the parallel and serial debug ports and communicates the results of the debug operation back over one of the serial and parallel debug ports.

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