Hidden control bits in a control register

Details Hidden control bits in a control register Hidden control bits in a control register

1986-04-14

1988-09-13

Hecker, Stuart N.

Static information storage and retrieval

Read/write circuit

Having particular data buffer or latch

365230, 307291, G11C 700

Patent

active

047714050

ABSTRACT:
First and second unused bits of a multi-bit mapped register are utilized to control a desired function. Each of the bits are capable of assuming first and second stable states. The control function is enabled when the first bit is in the first state and the second bit is in a second state. The function is disabled when the first bit is in the second state and the second bit is in the first state. The function remains unaltered when the first and second bits are each in the same state.

REFERENCES:
patent: 4110842 (1978-08-01), Sarkissian et al.
patent: 4231085 (1980-10-01), Bazlen et al.
patent: 4374331 (1983-02-01), Yamamoto et al.
patent: 4585997 (1986-04-01), Lin
Len K, "Logic Designers Manual" Reston Publishing Co., Reston, Va., 1977, pp. 173-177.

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