RAM having multiple ports sharing common memory locations

Details RAM having multiple ports sharing common memory locations RAM having multiple ports sharing common memory locations

1997-10-20

1999-08-31

Nelms, David

Static information storage and retrieval

Addressing

Multiple port access

365220, 36518904, G11C 800

Patent

active

059462620

ABSTRACT:
A memory having a SRAM, a DRAM and two external IO ports is provided. The SRAM has three IO ports for enabling the external IO ports and the DRAM to access each and every memory cell in the DRAM. Each SRAM cell is provided with two IO ports coupled to the external IO ports, and with an IO port for transferring data to and from the DRAM. The triple-port SRAM cell comprises three input data lines coupled to a latching circuit for writing data supplied from the external IO ports and the DRAM, and three output data lines coupled to the latching system for reading stored data to the external IO ports and the DRAM. Three write address lines and three read address lines provide addressing of the SRAM cell for data writing and reading operations performed by the external IO ports and the DRAM. Each SRAM cell may be read concurrently via all three ports to make the most current data stored in the SRAM accessible from any port at any time.

REFERENCES:
patent: 4731758 (1988-03-01), Lam et al.
patent: 4815038 (1989-03-01), Scharrer et al.
patent: 4891794 (1990-01-01), Hush et al.
patent: 5191553 (1993-03-01), Mizoguchi et al.
patent: 5249284 (1993-09-01), Kass et al.
patent: 5434818 (1995-07-01), Byers et al.
patent: 5566318 (1996-10-01), Joseph
patent: 5590087 (1996-12-01), Chung et al.
patent: 5680363 (1997-10-01), Dosaka et al.
patent: 5699317 (1997-12-01), Sartore et al.
patent: 5768178 (1998-06-01), McLaury

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