Semiconductor memory device for block access applications

Details Semiconductor memory device for block access applications Semiconductor memory device for block access applications

1995-04-13

1996-06-04

Nelms, David C.

Static information storage and retrieval

Addressing

Multiple port access

36523009, 365239, 365240, G11C 800

Patent

active

055239790

ABSTRACT:
A semiconductor memory device is disclosed including a main memory configured as a dynamic random access memory array having rows and columns, combined with a secondary memory having a data register file, a transferring circuit for allowing transfer of data between the main memory and secondary memory, a first parallel-by-bit interface for random accesses to the main memory and a second parallel-by-bit interface for access to the seconday memory. Concurrent and independent accesses of the main and secondary memories is achieved while maintaining the integrity of data. Further included in the secondary memory is a data register file and a corresponding mask register file wherein the latter achieves selection of any combination of words in a row of the secondary memory for the purposes of transferring the same to the main memory.

REFERENCES:
patent: 4541075 (1985-09-01), Dill et al.
patent: 4616310 (1986-10-01), Dill et al.
patent: 5179372 (1993-01-01), West et al.
patent: 5260905 (1993-11-01), Mori
patent: 5313431 (1994-05-01), Uruma et al.

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