34.3.1.3 SYNCH Character

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:

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.

The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.