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A.5. GPIO interface

Three eight-bit General Purpose Input/Output (GPIO) controllers are implemented in the Southbridge. GPIO ports 0 and 1 are available for use as general purpose external I/O on header J33 on the baseboard. GPIO port 3 is used internally by the PB11MPCore. See Figure 3.1 for the location of the GPIO header. The signals are shown in Figure A.6.

Figure A.6. GPIO connector

Figure A.6. GPIO connector


Each data pin has an on-board 10KΩ pullup resistor to 3.3V.

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