Data memory cache unit and data memory cache system

Details Data memory cache unit and data memory cache system Data memory cache unit and data memory cache system

2007-04-10

2007-04-10

Peugh, Brian R. (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

C711S126000, C711S143000

Reexamination Certificate

active

10802930

ABSTRACT:
A data memory cache unit is provided which is capable of heightening the speed of memory access. The cache unit117executes reading and writing of data in a 16-byte width line unit in a main memory unit131, executes reading and writing of data in an MPU113in the unit of a four-byte width small area included in each line. When the MPU113executes a push instruction, if a cache miss takes place on a line which includes a small area that holds data which should be read out to the MPU113(NO at S1), then the cache unit117opens the line (S301). If a small area into which the data sent from the MPU113should be written is adjacent to a line boundary on the side where an address is larger or on the side where write-in is earlier executed (YES at S56), then the cache unit117does not execute a refill, and if this small area is not adjacent to the line boundary (NO at S56), then it executes a refill (S21).

REFERENCES:
patent: 4701844 (1987-10-01), Thompson et al.
patent: 5603004 (1997-02-01), Kurpanek et al.
patent: 5706465 (1998-01-01), Kurokawa et al.
patent: 7065613 (2006-06-01), Flake et al.
patent: 2003/0191902 (2003-10-01), Snyder et al.
patent: 2004/0186959 (2004-09-01), Kawamoto
patent: 5-143330 (1993-06-01), None
patent: 2001-222467 (2001-08-01), None

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