MEMORY CARD CONTROLLER, MEMORY CARD DRIVE DEVICE, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To suppress generation of overhead influencing a read transfer rate while synchronizing a host device with a memory card, in memory card controller for controlling data transfer between the host device that requests data transfer by issuing a transfer request command and the memory card that executes a transfer operation from receipt of a transfer start instruction until receipt of a transfer end instruction.

SOLUTION: The memory card controller is provided with a clock start/end control unit 10 that suspends supply of a clock signal to the memory card when a data amount transferred from the memory card by the execution of the transfer operation reaches a data amount specified by a command received from the host device, and resumes supply of the clock signal to the memory card if a subsequent command received with supply of the clock signal to the memory card in a suspended state specifies an address consecutive to an end address of data transfer in response to the preceding command as a start address.

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