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TMS320F28031: GPIO36 is abnormal and cannot be high level.

Part Number: TMS320F28031


Problem: Due to the shortage of board resources, it is currently necessary to expand the output port. In the first test, GPIO34 was used. After checking DATASHEET, it was found that GPIO34 and GPIO37 determine the startup mode, which will cause the board to boot incorrectly and the board will not run.

Currently considering whether to use the three feet in JACK:




I don’t know if it can be used, some tests have been done

1. Configure the output port:

GPIO35 is normal

GPIO36 is abnormal and cannot be high level

GPIO38 is normal

2. Configured as input port:

GPIO35 is normal

GPIO36 is normal

GPIO38 is normal

3 After matching the input and output, use the emulator to simulate, no obvious problems are found, and the simulation can be normal.

At present, it is considered to be used as follows. I don't know if it is possible. Use the small board connector, plug it into the JACK when using it, and unplug it when simulation is needed.

GPIO35 output

GPIO36 input

GPIO38 input


Elsa Duan