P32C32 DI/DO LoopBack Test Wiring

1. Setting JP1 and JP2 to External Power

2. Connect the DI with DO
    ==> DI0 with DO0
        ........
        DI31 with DO31

3. Connect the Power Supply(+) with DI COM1A/COM2A (pin 18)
   Connect the Power Supply(+) with DO External Power(+, pin 37)

   Connect the Power Supply(-) with DI COM1B/COM2B (pin 19)
   Connect the Power Supply(-) with DO External GND(-, pin 1, 20)
