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.
35.2.1 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
• Zero wait state access to GPIO registers through IOPORT
NOTE
The GPIO module is clocked by system clock.
35.2.2 Modes of operation
The following table depicts different modes of operation and the behavior of the GPIO
module in these modes.
Table 35-1. 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.
35.2.3 GPIO signal descriptions
Table 35-2. GPIO signal descriptions
GPIO signal descriptions
Description
I/O
PORTA31–PORTA0
General-purpose input/output
I/O
PORTB31–PORTB0
General-purpose input/output
I/O
PORTC31–PORTC0
General-purpose input/output
I/O
PORTD31–PORTD0
General-purpose input/output
I/O
Table continues on the next page...
Introduction
Kinetis KE1xZ256 Sub-Family Reference Manual, Rev. 3, 07/2018
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NXP Semiconductors
Summary of Contents for Kinetis KE1xZ256
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