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UM10503
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© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.3 — 6 July 2012
331 of 1269
NXP Semiconductors
UM10503
Chapter 17: LPC43xx GPIO
When the designated pattern is detected on the selected input pins, the GPIO grouped
interrupt block will generate an interrupt. If the part is in a power-savings mode it will first
asynchronously wake the part up prior to asserting the interrupt request. The interrupt
request line can be cleared by writing a one to the interrupt status bit in the control
register.
17.4.3 GPIO port
The GPIO port registers can be used to configure each GPIO pin as input or output and
read the state of each pin if the pin is configured as input or set the state of each pin if the
pin is configured as output.