SPRUIV7B May 2022 – September 2023 AM620-Q1 , AM623 , AM625 , AM625-Q1 , AM625SIP
In the UART boot mode, the selected UART module (port) is the only peripheral configured. The baud rate, data, parity, and stop bits are configured based on the information in the UART boot parameter table. The boot parameter table definitions and the boot configuration values that can be set are in Section 5.4.7, UART Boot Device Configuration and Section 5.6.4, UART Boot Parameter Table.
Once the ROM Code configures the UART, it sends the UART pings for few seconds, which can be seen in the host. The pings consist of an ASCII capital C character. The UART boot mode supports only the CRC mode of XMODEM and does not support CHECKSUM mode. Both 128 and 1024 byte block sizes are supported.