Patent ID: 7929642

Claim:
A contactless integrated circuit card comprising: an analog interface block configured to demodulate a received radio frequency (RF) signal into multiple versions thereof according to a first plurality of communication protocols; a controller configured to select a protocol based on analysis of at least one of the multiple versions of the demodulated RF signal; and a universal asynchronous receiver/transmitter (UART) configured to select one of the demodulated versions of the RF signal according to the selected protocol, wherein the UART includes reception shift registers corresponding to the demodulated versions of the RF signal, the controller is further operable to control the analog interface block according to the selected protocol, and the UART further includes, a transmission shift register operable to store data to be transmitted, and a code conversion block operable to convert data that was shifted out of the transmission shift register into code data of a type corresponding to the selected protocol, and outputting the converted code data to the analog interface block.