LOCAL MEMORY READOUT SYSTEM

PROBLEM TO BE SOLVED: To improve the performance of a local memory by prereading data out of the local memory, and outputting the preread data when the address of data preread at a next read request matches the read address and immediately completing the read address. SOLUTION: A processor 1 initiat...

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Bibliographic Details
Main Authors OGAWA GENTA, HAYASHI ITSUKI
Format Patent
LanguageEnglish
Published 21.05.1999
Edition6
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:PROBLEM TO BE SOLVED: To improve the performance of a local memory by prereading data out of the local memory, and outputting the preread data when the address of data preread at a next read request matches the read address and immediately completing the read address. SOLUTION: A processor 1 initiates memory read actuation to an I/O 2 and when the data bus width of the local memory 4 is as wide as the data width of an I/O bus and the access time of the local memory 4 is longer than that of the I/O bus, data of a next address is preread between accesses of I/O data. When the addresses matches each other by next access, the access is immediately ended with the preread data. When the bus width of the local memory 4 is narrower than the data width of the I/O bus, data of the next address and the address right after it are preread again and when the address matches each other, the access is ended with the two preread data.
Bibliography:Application Number: JP19970296670