Microcomputer enabling an erase/write program of a flash memory

Details Microcomputer enabling an erase/write program of a flash memory Microcomputer enabling an erase/write program of a flash memory

1998-07-21

2000-11-28

Heckler, Thomas M.

Electrical computers and digital processing systems: support

Digital data processing system initialization or configuration

Loading initialization program

G06F 9445

Patent

active

061548375

ABSTRACT:
A microcomputer including a boot ROM that stores a boot program for transferring from an outside source to a RAM an erase/write program for rewriting a flash ROM. A CPU transfers the boot program from the boot ROM to the RAM, and executes it in a boot mode, and relocates the entire interrupt vectors excluding a reset interrupt vector to the RAM in the boot mode, with the reset interrupt vector remaining in the boot ROM. This enables the erase/write program transferred to the RAM to execute interrupt processings which cannot be carried out in a conventional microcomputer.

REFERENCES:
patent: 4679166 (1987-07-01), Berger et al.
patent: 5881295 (1999-03-01), Iwata

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