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1.There are three I/O ports. Port A consists of GPIO0-GPIO31, port B consists of GPIO32-GPIO38. The analog port consists of AIO0-AIO15.

2.(GPAPUD and GPBPUD)For pins that can function as ePWM output pins, the internal pullup resistors are disabled by default. All other GPIO-capable pins have the pullup enabled by default.

3.By default, all GPIO pins are inputs.