34.3.1.3 SYNCH Character
The SYNCH character has eight bits and follows the regular UPDI frame
format. It has a fixed data bit value of ‘
0x55
’. The SYNCH character
has two main purposes:- It acts as the enabling character for the UPDI after a disable.
- It is used by the Baud Rate Generator to set the baud rate for the subsequent transmission. If an invalid SYNCH character is sent, the next transmission will not be sampled correctly.