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TMS320F28377S: SCI BOOT 1 mode selection

Part Number: TMS320F28377S

I have a problem trying to program the f28377s through boot sci. I read the technical reference manual and I saw that pins 84 and 85 are the default values. It is possible to change to 28 and 29 writing OTP memory. I wrote it trying to write only the BMODE field (0x81 value). After that I´m still not able to program through boot sci and now, after programming the flash through JTAG the program runs, but then I power off and power on the board and program does not run. I have 3 more boards with the OTP not programed yet and with JTAG I am able to program them (with the same program as in board with the OTP already programmed) and after power off and power on the boards run the program correctly.

Could you help me what should do to change boot sci from default pins to 28 and 29? I have read many documentation and forum threads without any clarification.