Electronic apparatus that communicates with host through serial communication interface

摘要

A smart card that communicates with a host through a serial communication interface at variable transmission speed is provided, where the smart card variably controls the generation of a connection information signal in accordance with data transmission speed information received from the host to transmit the connection information signal to the host, to prevent errors from being generated due to the difference between the work waiting time in accordance with transmission speed set in the smart card and the work waiting time determined in accordance with actual transmission speed.