Microcircuit card, has direct memory access transfer unit for transferring numeric data, and CPU controlling transfer of numeric data based on security data given by signals

摘要

The card has a direct memory access transfer unit (12) for transferring numeric data (DATA). The transfer unit is located between an input/output port (14) and a memory zone (18). The security data (DATACTRL) obtained from the data is communicated with a CPU (26) by the signals (20). The CPU controls the transfer of numeric data based on the security data.