T = 0 Protocol Communication

Transmission with T = 0:

1. Write data into UxTXB.
2. Take appropriate actions according to the ISO 7816 standard if the WTCIF, GTCIF and/or TXRPTIF bits are set.
3. Set LAST = 1 (UxTXB[15]) for the last byte of the data.
   Note: Due to the UxTX and UxRX pins being shorted, a receive interrupt will be generated on transmission of a character if enabled. It is recommended to disable receive interrupts when transmitting.

Reception with T = 0:

1. Read the UxRXB as the data become available upon a receive interrupt.
2. Take appropriate actions according to the ISO 7816 standard if the WTCIF, GTCIF and/or RXRPTIF bits are set.
   Note: For the last character, the user must ensure that the guard time is satisfied before transmitting the response. The GTC may be used for this purpose, whereas the WTC interrupt may be disabled or ignored.