Controller for refreshing a PSRAM using individual automatic ref

Details Controller for refreshing a PSRAM using individual automatic ref Controller for refreshing a PSRAM using individual automatic ref

1992-09-18

1997-04-01

Moore, David K.

Static information storage and retrieval

Magnetic bubbles

Guide structure

395414, 395433, 365222, G11C 700

Patent

active

056175515

ABSTRACT:
A controller commands the memory refreshment of a pseudo-static random access memory (PSRAM) accessible from a remote host processor. The controller includes a detector for the end of a memory access cycle by the host processor. A tapped delay line is activated by the detector at the end of the memory access cycle of the PSRAM. The tapped delay line produces a series of delay line output signals at a series of preselected times after activation. An automatic refresh of the PSRAM is initiated upon receipt of a first tapped delay line output signal. The automatic refresh is discontinued upon receipt of a second tapped delay line output signal that follows the first tapped delay line output signal by a sufficient time to permit performance of an automatic refresh. Further refresh cycles can be initiated if the host does not seek memory access, and the further refresh cycles can begin immediately or be delayed by some selected amount of time.

REFERENCES:
patent: 3748651 (1973-07-01), Mesnik
patent: 3800295 (1974-03-01), Anderson, Jr. et al.
patent: 4172282 (1979-10-01), Aichelmann, Jr. et al.
patent: 4317169 (1982-02-01), Panepinto, Jr. et al.
patent: 4360903 (1982-11-01), Plachno et al.
patent: 4723204 (1988-02-01), Khera
patent: 4809233 (1989-02-01), Takemae
patent: 4827453 (1989-05-01), Sawada et al.
patent: 4958322 (1990-09-01), Kosugi et al.
patent: 5075886 (1991-12-01), Isobe et al.
patent: 5095463 (1992-03-01), Toda et al.
patent: 5206830 (1993-04-01), Isobe et al.
patent: 5272676 (1993-12-01), Kubono et al.
patent: 5301164 (1994-04-01), Miyawaki
patent: 5333128 (1994-07-01), Yoon et al.
Hitachi Corporation, "Hitachi PSRAM Application Note", entire document (1990), Sep.
Advanced Micro Devices, "PALCE16VSH-10 EE CMOS 20-Pin High-Speed Universal Programmable Array Logic", entire document (1991), Oct.

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