| 摘要 |
PURPOSE:To connect a control microcomputer for an electronic device and its peripheral device with less number of signal lines through the use of a serial communication interface function built in a microcomputer. CONSTITUTION:An access request signal from a control microcomputer 1 to a communication IC3 is used for a reply signal with respect to an access request signal from the communication IC3 to the control microcomputer 1. Moreover, the access request signal from the communication IC3 to the control microcomputer 1 conversely is used for a reply signal with respect to the access request signal from the control microcomputer to the communication IC3 to decrease number of control signals. |
