Introduction; Features; Modes Of Operation; Gpio Signal Descriptions - NXP Semiconductors MKL27Z128VFM4 Reference Manual

Introduction

41.2 Introduction
The GPIO registers support 8-bit, 16-bit or 32-bit accesses.
The GPIO data direction and output data registers control the direction and output data of
each pin when the pin is configured for the GPIO function. The GPIO input data register
displays the logic value on each pin when the pin is configured for any digital function,
provided the corresponding Port Control and Interrupt module for that pin is enabled.
Efficient bit manipulation of the general-purpose outputs is supported through the
addition of set, clear, and toggle write-only registers for each port output data register.

41.2.1 Features

Features of the GPIO module include:
• Port Data Input register visible in all digital pin-multiplexing modes
• Port Data Output register with corresponding set/clear/toggle registers
• Port Data Direction register
The GPIO module is clocked by system clock.

41.2.2 Modes of operation

The following table depicts different modes of operation and the behavior of the GPIO
module in these modes.
822
Table 41-1. Modes of operation
Modes of operation Description
Run The GPIO module operates normally.
Wait The GPIO module operates normally.
Stop The GPIO module is disabled.
Debug The GPIO module operates normally.
KL27 Sub-Family Reference Manual , Rev. 5, 01/2016
NOTE
Freescale Semiconductor, Inc.