Patent ID: 6609166
Filing Date: 2003-08-19
Classification: H04B

Abstract:
An IrDA communication IC comprising:an input/output interface for converting data fed in from outside the IrDA communication IC into a parallel data to processed within the IrDA communication IC, and for converting parallel data output from within the IrDA communication IC into data to be fed out to outside the IrDA communication IC; a protocol control circuit for converting the parallel data fed from the input/output interface into an IrDA-protocol-conforming signal, and for converting an IrDA-protocol-confirming signal fed in from outside and demodulated into parallel data and then feeding this parallel data to the input/output interface; a modulation circuit for modulating the IrDA-protocol-conforming signal fed from the protocol control circuit; a demodulation circuit for demodulating the signal fed in from outside and then feeding this demodulated signal to the protocol control circuit; a first timer circuit for periodically starting and stopping part of operation of the IrDA communication IC to check whether there is a signal coming from a communication partner or not; and a second timer circuit for inhibiting reception operation for a predetermined period of time after completion of transmission, wherein the protocol control circuit also controls operation of the modulation circuit and the demodulation circuit.