Electrical computers and digital processing systems: memory – Storage accessing and control – Shared memory area
Reexamination Certificate
2011-01-18
2011-01-18
Thai, Tuan V. (Department: 2185)
Electrical computers and digital processing systems: memory
Storage accessing and control
Shared memory area
C711S100000, C711S154000
Reexamination Certificate
active
07873796
ABSTRACT:
In an information processor system including a memory device (MEM0), a memory control device (SL0) capable of controlling an operation of the memory device, and a plurality of bus masters (MS0to MS3) capable of giving access to the memory device through the memory control device, the memory control device includes a control circuit (SDCON) capable of giving a notice of information about a time that a data transfer from the memory device can be started to the bus master related to an access request. The bus master can cause the time information thus given to be a judgment factor as to whether an access request is given to the memory device or not. Consequently, each of the bus masters can avoid the generation of a useless access request and a data transfer to the masters to be accessed can be carried out smoothly.
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Miles & Stockbridge P.C.
Renesas Electronics Corporation
Thai Tuan V.
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