Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2005-01-19
2008-05-27
Portka, Gary J (Department: 2188)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C365S189040, C711S104000, C711S168000
Reexamination Certificate
active
07380076
ABSTRACT:
The present invention makes it possible to inexpensively and quickly execute a process of rewriting data stored in a memory, thus reducing the power consumption of an information processing apparatus. In connection with a conventional Read-Modify-Write function, an information processing apparatus1first issues a write instruction, and after all the write commands in the write instruction have been issued, issues read commands from the read instruction. That is, the read commands are issued immediately after the write commands without issuing a precharge command from the write instruction or an active command from the read instruction. This serves to avoid executing the precharge and active commands between instructions which commands are unwanted for accesses to the same row address. The adverse effect of a CAS latency can also be avoided. Therefore, it is possible to inexpensively and quickly execute the process of rewriting data stored in the memory.
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Oliff & Berridg,e PLC
Portka Gary J
Seiko Epson Corporation
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