| 摘要 |
<p>PURPOSE:To protect contents of recording and to prevent destruction by detecting extraction of recording medium according to a signal from a connector and operating destruction preventing sequence of a built-in memory. CONSTITUTION:When an IC card 12 is extracted by mistake, a connector 14 becomes non-connecting state with an IC chip readig and writing device earlier than other connectors. Then, a fall detecting circuit 18 detects fall according to a signal from the connector 14, and the detection signal is outputted to an FF circuit 19. Thus, the supply of a chip selection signal from a CPU16 to an ROM17 is stopped. Consequently, the reading or writing is not performed simultaneously with extraction of the IC card, and the contents of memory of ROM17 are protected from becoming erroneous one, and destruction of ROM is prevented.</p> |
