NON-CONTACT TYPE INFORMATION CARD AND COMMUNICATION SYSTEM

摘要

PURPOSE:To attain the accurate control of entrance end leaving to a specific area without limiting the carrying way of a non-contact information card nor causing the deterioration of the processing speed in a communication system. CONSTITUTION:When a new command signal is received through an antenna circuit 16 and a MODEM circuit 15, a CPU 11 decides whether the place and time codes included in the received command are coincided or not with the external. device ID information 131. and the processing time information 132 on the command signal stored in a RAM 13 and related to the preceding reception. If so, the operation of a clock generating circuit 29 is kept discontinued until the next command signal is received. Thus the operation of the CPU 11 is also stopped.