Part Number: TMS320F280039C
Hello Support team,
I'm triyng to implement the software controlled firmware update mentioned in AppNote SPRACN1 on the TMS230F280039C control board.
S2 boot pins are configure as 1 for flash boot, I'm using standard pins.
I've added an RC netwrk on GPIO24 as explained in the ANAppNote.
I trigger a watchdog reset by sending a UART pattern. Just before calling the watchdog reset function I set GPIO24 as output and put it to 0 for 50us as specified in the datasheet.
At tihis pont I'm expecting that the microcontroller boots from SCI but unfortunately it boots again from flash.
I've checked with the scope on pin 75 of the docking and the GPIO24 is properly pulled down. before the reset signal is shown on pin 120.
Could you show me where the issue could be?
Thank you