Pin - is a variable/constant which specifies the i/o pin to use.
Make pin an input. This command is only required on microcontrollers with programmable input/ output pins. This command can be used to change a pin that has been configured as an output back to an input. All pins are configured as inputs on first power-up (unless the pin is a fixed output). Fixed pins are not affected by this command. These pins are:
08, 08M, 08M2 0 = fixed output 3 = fixed input 14M2 B.0 = fixed output C.3 = fixed input 18M2 C.3 = fixed output C.4, C.5 = fixed input 20M2, 20X2 A.0 = fixed output C.6 = fixed input 28X2, 40X2 A.4 = fixed output
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