Information

Chapter 11
Port control and interrupts (PORT)
11.1 Introduction
NOTE
For the chip-specific implementation details of this module's
instances see the chip configuration chapter.
11.1.1 Overview
The port control and interrupt (PORT) module provides support for port control, and
external interrupt functions. Most functions can be configured independently for each pin
in the 32-bit port and affect the pin regardless of its pin muxing state.
There is one instance of the PORT module for each port. Not all pins within each port are
implemented on a specific device.
11.1.2 Features
The PORT module has the following features:
• Pin interrupt
• Interrupt flag and enable registers for each pin
• Support for edge sensitive (rising, falling, both) or level sensitive (low, high)
configured per pin
• Support for interrupt or DMA request configured per pin
• Asynchronous wakeup in Low-Power modes
• Pin interrupt is functional in all digital Pin Muxing modes
• Port control
• Individual pull control fields with pullup, pulldown, and pull-disable support
• Individual drive strength field supporting high and low drive strength
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
Freescale Semiconductor, Inc. 203