Semiconductor memory device having a serial access memory

Details Semiconductor memory device having a serial access memory Semiconductor memory device having a serial access memory

1989-09-15

1992-03-17

Clawson, Jr., Joseph E.

Static information storage and retrieval

Read/write circuit

Bad bit

365221, 36523009, 365236, 365239, 365241, 371 102, G11C 700

Patent

active

050974475

ABSTRACT:
A semiconductor memory device includes a RAM and a serial access memory (SAM). The SAM includes an address counter which generates a slave address and a master address. The slave address precedes the master address by half the period of a serial access strobe signal. A redundancy decision is made by comparing the slave address with a redundancy address. When the master address is supplied to a data register provided in the SAM, the decision result is available. That is, the SAM can be accessed immediately after the master address is supplied thereto.

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