2.3.13. Parity error

If character‑transmit handshaking is enabled (RXNAK = 1) and the interface detects a parity error, it signals this to the card by pulling the input/output line down for 2 etus at 10.5 etus after the leading edge of the start bit.

The maximum number of times the interface attempts to receive a character is governed by the SCIRETRY register. If, after RXRETRY further attempts, the character has not be successfully received, a parity error for the character is flagged. When this character is read, bit 8 of SCIDATA is set to 1 to indicate that a parity error has occurred.

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