Microcomputer with ROM test mode of operation

Details Microcomputer with ROM test mode of operation Microcomputer with ROM test mode of operation

1982-02-11

1985-03-26

Smith, Jerry

Boots, shoes, and leggings

371 17, G06F 1300

Patent

active

045077274

ABSTRACT:
A system for real-time digital signal processing employs a single-chip microcomputer device having separate on-chip program and data. An external program address bus allows off-chip program fetch in an expansion mode, with the opcode returned by an external data bus. A bus interchange module allows transfer between the separate internal program and data busses in special circumstances; for example, the internal program ROM may be read out on the data bus, one opcode at a time for test purposes, without executing the opcodes.

REFERENCES:
patent: 3987420 (1976-10-01), Badagnani
patent: 4308615 (1981-12-01), Koegel et al.
patent: 4412281 (1983-10-01), Works
Cukier, M. et al., "Test Device for Microprocessor Programming" IBM Tech. Discl. Bulletin, vol. 21, No. 10, Mar. 1979.
Antoine, J. M. et al., "Effective Software Debugging Using a Program Tracer", Electrical Communication, vol. 54, No. 2, 1979.

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