Synchronous semiconductor memory device

Details Synchronous semiconductor memory device Synchronous semiconductor memory device

2005-06-28

2005-06-28

Auduong, Gene N. (Department: 2827)

Static information storage and retrieval

Read/write circuit

Data refresh

C365S201000, C365S233100

Reexamination Certificate

active

06912169

ABSTRACT:
A self refresh operation control device, for use in a semiconductor memory device, includes a self refresh pulse signal generation block for generating a self refresh pulse signal, a self refresh entry signal and a self refresh mode clock enable signal in response to a clock enable signal, a self refresh signal, a self refresh end signal and a test mode signal, wherein the self refresh pulse signal is generated during the inactivated period of the clock enable signal by using the test mode signal; a normal mode clock signal generation block for generating a normal mode clock signal and a counter reset signal in response to the clock enable signal, the self refresh mode clock enable signal, a test mode signal and the self refresh signal; and an internal row address counter in response to the self refresh pulse signal and the counter reset signal for generating internal addresses for use in the self refresh operation.

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