SPRZ422K August 2014 – May 2024 TMS320F28374S , TMS320F28375S , TMS320F28375S-Q1 , TMS320F28376S , TMS320F28377S , TMS320F28377S-Q1 , TMS320F28378S , TMS320F28379S
Boot ROM: Calling SCI Bootloader from Application
B, C
The ROM SCI bootloader uses autobaud lock to lock the baud rate. The SCI baud rate is split between two registers, SCILBAUD and SCIHBAUD. The ROM SCI bootloader expects SCIHBAUD to contain its default reset value of zero. If calling the ROM SCI bootloader from an application that modified the contents of SCIHBAUD to be non-zero, then the SCI will not autobaud lock and the SCI bootloader will not execute.
Clear SCIHBAUD to zero before calling the ROM SCI bootloader.