Patent ID: 6725375
Filing Date: 2004-04-20
Classification: G06F

Abstract:
A microcomputer comprising:a memory for storing data, including a CPU program to be executed by a CPU; an IC card interface section adapted to be connected with an external apparatus comprising an IC card; a discrimination information storing unit which is set in advance with information associated with a discrimination signal which may identify said external apparatus connected via said IC card interface section; external apparatus discrimination means for discriminating said external apparatus when it is connected to said IC card interface section by comparing the discrimination signal with the information associated with the discrimination signal which is set in said information storing unit, when feedings of a power supply and a clock signal and initializing of an operation are carried out to the external apparatus which is connected via said IC card interface section to be set in a communicatable status; and memory contents change means for executing the changing contents of said memory by receiving new data from said external apparatus when said external apparatus discrimination means discriminates, based on said discrimination signal, that an external apparatus which is adapted to send data associated with the changing of the contents of said memory is connected via said IC card interface section.