Microcomputer with a detecting function of a memory access error

Details Microcomputer with a detecting function of a memory access error Microcomputer with a detecting function of a memory access error

1984-08-27

1988-08-09

Heckler, Thomas M.

Boots, shoes, and leggings

G06F 1100

Patent

active

047632488

ABSTRACT:
A microcomputer with a stored program memory has a detecting circuit for detecting a memory access error by which an unrequired code is read out of the memory. The detecting circuit receives a read-out instruction code from the memory according to memory access operation in parallel with a receiving operation of an instruction decoder and detects a read-out code from a memory location in which a program to be processed is not written. Undesired processing can be immediately inhibited and the operator can easily find the occurrence of the memory access error.

REFERENCES:
patent: 4061908 (1977-12-01), de Jong et al.
patent: 4079453 (1978-03-01), Dahl
patent: 4369511 (1983-01-01), Kimura et al.
patent: 4546429 (1985-10-01), Chan et al.
patent: 4553225 (1985-11-01), Ohe
patent: 4583163 (1986-04-01), Kobayashi et al.

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