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 PB-A8. See Figure 3.1 for the location of the GPIO header. The signals are shown in Figure A.6, note the position of the polarizing key.

Figure A.6. GPIO connector

To view this graphic, your browser must support the SVG format. Either install a browser with native support, or install an appropriate plugin such as Adobe SVG Viewer.


Note

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

Copyright © 2008-2011 ARM Limited. All rights reserved.ARM DUI 0417D