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TMS320F280049C: Selecting SCI Boot mode using GPIO 32 and GPIO 24

Philip Webb
Prodigy 140 points
Part Number: TMS320F280049C

I have configured my hardware to set GPIO32 to a 1 and GPIO 24 to be a 0. This should get the 280049C device to boot into the SCI bootmode.

In this mode my intention is to send down the upgrade kernel so that I can flash the device.

However when I send it an autobaud lock character 'A' (hex 41)  I do not get the echo back. I can scope the SCI rx line and see the character but I do not see any echo on the corresponding tx line from the processor.

I note in the TRM that the SCI boot mode is also labeled as the WAIT mode. How do I know that my processor is not sat in the wait mode?

Is there another level of configuration to force the SCI boot mode ?

Any tips or guidance would be greatly appreciated.

Cheers

Phil