Pre-ATR Initialization

The module should be configured in Receive mode prior to the Reset line being pulled low to initiate the smart card’s response as follows:

  1. Write the BRG register with a value corresponding to REFO/372.
  2. Configure Smart Card mode by writing ‘0b1111’ to the MODE[3:0] bits.
  3. Set the ON, RXEN and TXEN bits.
  4. Configure the RX interrupt watermark using the RXWM[2:0] bits (UxSTAT[26:24]).
  5. Read data out of UxRXB as they become available and save for ATR processing.