Microcomputer having a program correction function

Details Microcomputer having a program correction function Microcomputer having a program correction function

1995-10-18

1997-01-07

Beausoliel, Jr., Robert W.

Excavating

371 102, G01R 3128, G06F 1100

Patent

active

055926134

ABSTRACT:
A microcomputer includes a program memory for storing program data, a program counter for addressing the program memory, an instruction decoder for decoding the program data read out from an address of the program memory addressed by the program counter, an electrically programmable nonvolatile memory for storing address data denoting an address of the program memory where program data to be corrected is stored, and correction program data, a comparator for comparing the output from the program counter with the address data stored in the nonvolatile memory and outputting a coincidence signal when a coincidence is found therebetween, and a program correction circuit for reading out the program data from the nonvolatile memory in response to the coincidence signal, and for supplying the readout data to the instruction decoder in place of the output from the program memory. According to another feature, the microcomputer may comprise a program correction circuit wherein a correction address is supplied to a program counter, and wherein code sections are stored.

REFERENCES:
patent: 3748653 (1973-07-01), Debruyne et al.
patent: 4400798 (1983-08-01), Francis et al.
patent: 4542453 (1985-09-01), Patrick et al.
patent: 4737814 (1988-04-01), Nakajima
patent: 4802119 (1989-01-01), Heene et al.
patent: 4831517 (1989-05-01), Crouse et al.
patent: 4914464 (1990-04-01), Azuma et al.
patent: 4928281 (1990-05-01), Kurosawa et al.
patent: 5051897 (1991-09-01), Yamaguchi et al.
patent: 5237687 (1993-08-01), Okamoto
NEC Technical Report vol. 41, No. 14/1988; "4-bit Single Chip Microcomputer .mu. COM-75X Family"; pp. 69-74.
NEC Device Technology No. 24/1988; "Custom Microcomputer"; pp. 8-11.

Affiliated with

Also associated with

Rating

Microcomputer having a program correction function does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Microcomputer having a program correction function, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microcomputer having a program correction function will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1772578