12.4.20 Receiver Timeout Register (RTO)

Table 12-27. RTO
Bit Number Name R/W Reset Value Description
[7:0] RTO R/W 0 Writing to the RTO register sets the counter value and enables, if the ERTO bit in the Table 12-22 is enabled. You can configure the timeout value by writing into this register. The RTO counts when the Rx block input state is idle; is reset when a start condition occurs, and restarts counting upon returning to the idle state. When the RTO value is reached, the RTOII interrupt is set. Re-writing the RTO register clears the interrupt and sets the counter.

The receiver timeout value equation is based on the baud rate bit time (Tbit) as follows:

Rx Timeout Value = 4 x RTO x Bit Time (Tbit)