Static information storage and retrieval – Powering
Patent
1994-09-16
1996-07-16
Nelms, David C.
Static information storage and retrieval
Powering
365195, 365206, 307 43, G11C 700
Patent
active
055373607
ABSTRACT:
A programmable power controller controls power between a primary power source and a secondary power source and powering first circuitry. The primary power source has a first voltage and the secondary power source has a second voltage. A control register has a first field, which is field used to activate circuitry used to direct power from the primary power source to the secondary power source. First logic circuitry compares the first voltage and the second voltage to determine which is greater and then couples the primary power source or the secondary power source, depending upon which is greater, to power the first logic circuitry, second logic circuitry, and memory. The memory is coupled to the first logic circuitry and is read and written to via an input/output buffer. The second logic circuitry is coupled to the memory and to said first logic circuitry and activates write protection circuitry to prevent writing to the memory if the secondary power source is powering the first logic circuitry, the second logic circuitry, and the memory.
REFERENCES:
patent: 3673576 (1972-06-01), Donaldson, Jr.
patent: 3895239 (1975-07-01), Alaspa
patent: 4013902 (1977-03-01), Payne
patent: 4034348 (1977-07-01), Rathbun
patent: 4365291 (1982-12-01), Zanchi et al.
patent: 4500953 (1985-02-01), Takezoe et al.
patent: 4571602 (1986-02-01), De Schamphelaere et al.
patent: 4571603 (1986-02-01), Hornbeck et al.
patent: 4591745 (1986-03-01), Shen
patent: 4612632 (1986-09-01), Olson
patent: 4633107 (1986-12-01), Norsworthy
patent: 4663730 (1987-05-01), Ikeda
patent: 4670676 (1987-06-01), Nishitani
patent: 4797584 (1989-01-01), Aguti et al.
patent: 4812679 (1989-03-01), Mahabadi
patent: 4818904 (1989-04-01), Kobayashi et al.
patent: 4874965 (1989-10-01), Campardo et al.
patent: 4885476 (1989-12-01), Mahabadi
patent: 4886984 (1989-12-01), Nakaoka
patent: 4900950 (1990-02-01), Dubujet
patent: 4902907 (1990-02-01), Haga et al.
patent: 4931985 (1990-06-01), Glaise et al.
patent: 4953077 (1990-08-01), Alvarez, II et al.
patent: 4970418 (1990-11-01), Masterson
patent: 4975883 (1990-12-01), Baker et al.
patent: 5019966 (1991-05-01), Saito et al.
patent: 5081701 (1992-01-01), Silver
patent: 5307318 (1994-04-01), Nemoto
patent: 5349669 (1994-09-01), Arai et al.
patent: 5357458 (1994-10-01), Yu et al.
Texas Instruments, The TTL Data Book, 1980-1981, 7-460 to 7-464.
Dallas Semiconductor, Dallas Semiconductor Data Book, DS1215, DS1217A and DS1217M, 1987-1988.
Jones Brian W.
Morton Alan M.
Dallas Semiconductor Corporation
Nelms David C.
Nguyen Tan T.
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