Write protection circuit and method for a control register

Details Write protection circuit and method for a control register Write protection circuit and method for a control register

1983-11-02

1986-04-01

Popek, Joseph A.

Static information storage and retrieval

Read/write circuit

Having particular data buffer or latch

365194, G11C 700

Patent

active

045802467

ABSTRACT:
A write protection circuit for a control register includes a first logic circuit which provides a write enable signal to the control register in response to simultaneously receiving a register select signal, a write control signal and an enable signal. A second logic circuit provides the enable signal to the first logic circuit only until the first logic circuit first provides the write enable signal. The second logic circuit will also cease to provide the enable signal in response to a time-out signal. In response to either a reset signal or a test signal, the second logic circuit will again provide the enable signal.

REFERENCES:
patent: 3866061 (1975-02-01), Wen et al.

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