Single-chip microcomputer having a program register for controll

Details Single-chip microcomputer having a program register for controll Single-chip microcomputer having a program register for controll

1985-09-30

1988-06-21

Williams, Jr., Archie E.

Boots, shoes, and leggings

365185, 365218, G06F 1202

Patent

active

047528710

ABSTRACT:
A single-chip microcomputer comprises at least two separate and independent electrically erasable programmable read only memories (EEPROMs) on-board which may be independently programmed, erased and read. Each part of the split EEPROM has its own data bus and address bus. Programming and erasing is controlled by a program register which has separate bits for configuring and latching the data and address buses of a selected EEPROM array, for providing programming voltage to the array of choice and for choosing between programming and erasing the selected array. The split EEPROM provides versatility to the user in allowing one part of the EEPROM to be programmed while the program stored in another part of the EEPROM or RAM may be read and utilized. In addition, test time and effort of the microcomputer may be considerably reduced.

REFERENCES:
patent: 4153933 (1979-05-01), Blume, Jr.
patent: 4382279 (1983-05-01), Ugon
patent: 4491907 (1985-01-01), Koeppen et al.
patent: 4498151 (1985-02-01), Henry
patent: 4519028 (1985-05-01), Olsen
patent: 4698750 (1987-10-01), Wilkie et al.
"Non-Volatile Semiconductor Storage for Printers" J. I. Compton IBM Technical Disclosure Bulletin vol. 24 No. 8 Jan. 1982 pp. 4361-4362.

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