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Hardware Description
ARM DUI 0224F Copyright © 2003-2007 ARM Limited. All rights reserved. 3-71
3.11 GPIO interface
The GPIO signals GPx_[7:0] from the ARM926EJ-S PXP Development Chip are
connected to the GPIO connectors and the RealView Logic Tile as shown in
Figure 3-29.
The GPIO signals are also connected to the expansion connector for the optional
RealView Logic Tile. This enables you to use the GPIO signals with custom logic you
implement in the tile.
See also General Purpose Input/Output, GPIO on page 4-56, the ARM926EJ-S
Development Chip Reference Manual and the ARM PrimeCell GPIO (PL061) Technical
Reference Manual. See GPIO interface on page A-14 for connector pinout information.
Figure 3-29 GPIO block diagram
Note
Bit 7 of GPIO 3 is used for the battery voltage signal BATOK from the system
controller.