4.1.1. About the GPIO

Bits [7:4] can be individually programmed as an input or an output, but bits [3:0] are output-only. Bits in the data register are set and cleared using the GPIO_DATASET and GPIO_DATACLR registers. Bits are read and written to using the GPIO_DATAIN and GPIO_DATAOUT locations.

Copyright © 2002 ARM Limited. All rights reserved.ARM DUI 0159B