Synchronous semiconductor memory device allowing easy and fast t

Details Synchronous semiconductor memory device allowing easy and fast t Synchronous semiconductor memory device allowing easy and fast t

1999-03-17

2000-08-29

Fears, Terrell W.

Static information storage and retrieval

Addressing

36518901, 36523003, G11C 700

Patent

active

061118079

ABSTRACT:
A synchronous semiconductor memory device performs input/output of data in synchronization with an externally applied external clock signal or a data strobe signal in a test operation mode. An operation of an internal circuit in the test operation mode is performed in synchronization with a clock signal produced by an internal control clock producing circuit and being faster than the external clock. In the test operation mode, a decode circuit produces write data based on data applied to a specific terminal among data I/O terminals, and a result of comparison of a plurality of read data is issued to the specific terminal during a data read operation.

REFERENCES:
patent: 5487050 (1996-01-01), Kim
"A 2.5-ns Clock Access, 250-MHz, 256-Mb SDRAM with Synchronous Mirror Delay", by Saeki et al., IEEE Journal of Solid-State Circuits, vol. 31, No. 11, Nov. 1996, pp. 1656-1665.

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