Ic card processing system capable of determing send timing between an ic

Abstract

According to a portable electronic apparatus processing system of this invention, an IC card sends, to an IC card reader/writer, first timer data included in an answer to reset signal and defining a time after it sends the answer to reset signal to the IC card reader/writer until an instruction is received from the IC card reader/writer. The IC card receives a first instruction from the IC card reader/writer and executes corresponding processing. The IC card also sends second timer data included in the answer to reset signal and defining a time after the processed result is sent to the card reader/writer until the next instruction is received from the card reader/writer. The card reader/writer sets the first timer data in a timer, and sets the second timer data in a memory. The card reader/writer sends the first instruction to the IC card in response to a time out signal from the timer. When the card reader/writer receives the processed result from the IC card, it reads out the second timer data from the memory, and sets the readout data in the timer. Then, the reader/writer sends the next instruction to the IC card in response to the time out signal from the timer.