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PROBLEM TO BE SOLVED: To make a proper response irrelevantly to whether or not electric power is supplied when data is sent to or received from another device on a command/response basis. SOLUTION: A command in-execution flag table 14 is provided at part of a nonvolatile memory and if a command in-e...

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1. Verfasser: KAWAKITA TATSUJIRO
Format: Patent
Sprache:eng
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Zusammenfassung:PROBLEM TO BE SOLVED: To make a proper response irrelevantly to whether or not electric power is supplied when data is sent to or received from another device on a command/response basis. SOLUTION: A command in-execution flag table 14 is provided at part of a nonvolatile memory and if a command in-execution flag is not cleared when a command block 100 received from another device 300 is normally received, the command correspondence flag in the command in-execution flag table is set to perform a command executing process; and the flag is cleared after a response block 200 is sent out.