Signal transfer timing control using stored data relating to operating speeds of memory and processor
First Claim
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1. A memory controlling apparatus for controlling signal transfer between a memory for storing data and a processor for processing the data accessed to said memory, comprising:
- means for retaining time information based on the operating speed of at least said memory and said processor, including means for receiving from said processor and storing respective data relating to the operating speed of said processor and the operating speed of said memory; and
control means for controlling the timing of signal transfer between said processor and said memory based on at least said time information of said retaining means, including first means responsive to said processor for transmitting a memory access signal to said memory and second means connected to said receiving and storing means and responsive to said access signal for transmitting to said memory a signal to command said memory to transmit data to said processor at a time subsequent to transmission of said memory access signal which is determined by said data relating to the operating speed of said memory and said processor as stored in said receiving and storing means.
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Abstract
A memory controlling apparatus retains time information prepared based on performance of a memory and a processor, and determines timing of signal exchange between the memory and the processor based on the time information. An access time to the memory is reduced while maintaining a flexibility to a change of the access time due to increase of memory capacity or reconfiguration of the memory.
143 Citations
14 Claims
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1. A memory controlling apparatus for controlling signal transfer between a memory for storing data and a processor for processing the data accessed to said memory, comprising:
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means for retaining time information based on the operating speed of at least said memory and said processor, including means for receiving from said processor and storing respective data relating to the operating speed of said processor and the operating speed of said memory; and control means for controlling the timing of signal transfer between said processor and said memory based on at least said time information of said retaining means, including first means responsive to said processor for transmitting a memory access signal to said memory and second means connected to said receiving and storing means and responsive to said access signal for transmitting to said memory a signal to command said memory to transmit data to said processor at a time subsequent to transmission of said memory access signal which is determined by said data relating to the operating speed of said memory and said processor as stored in said receiving and storing means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification