The SYNCH character has eight bits and follows the regular UPDI frame format. It has a
fixed value of
0x55
. The SYNCH character has two main purposes:
- 1.It acts as the enabling character
for the UPDI after a disable.
- 2.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.