Multiplexed programming voltage and status over single conductor

Details Multiplexed programming voltage and status over single conductor Multiplexed programming voltage and status over single conductor

1995-11-28

1997-11-25

Sikes, William L.

Static information storage and retrieval

Powering

36443112, G11C 800, G06F 1900

Patent

active

056919476

ABSTRACT:
An analog switch (100) isolates a microprocessor (120) from potentially damaging programming voltages input to a PROM (110). The microprocessor (120) controls the switch (100) to allow a lower, status voltage to be input to the microprocessor (120). When the PROM (110) is to be programmed, the microprocessor (120) opens the switch (100) to isolate the microprocessor (120) and allow the 12 VDC to only be coupled to the PROM (110).

REFERENCES:
patent: 4171539 (1979-10-01), Tawfik
patent: 4868832 (1989-09-01), Marrington
patent: 4908799 (1990-03-01), Gaudronneau
patent: 4962484 (1990-10-01), Takeshima
patent: 5070481 (1991-12-01), Haubner
patent: 5095228 (1992-03-01), Galbraith
patent: 5157629 (1992-10-01), Sato
patent: 5223748 (1993-06-01), Mumper
patent: 5285452 (1994-02-01), Wee

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