Datasheet

Table Of Contents

32. PORT - I/O Pin Controller

32.1 Overview

The I/O Pin Controller (PORT) controls the I/O pins of the device. The I/O pins are organized in a series

of groups, collectively referred to as a PORT group. Each PORT group can have up to 32 pins that can

be configured and controlled individually or as a group. The number of PORT groups on a device may

depend on the package or number of pins. Each pin may either be used for general purpose I/O under

direct application control or be assigned to an embedded device peripheral. When used for general

purpose I/O, each pin can be configured as input or output, with a highly configurable driver and pull

settings.

All I/O pins have true read-modify-write functionality when used for general purpose I/O. The direction or

the output value of one or more pins may be changed (set, Reset or toggled) explicitly without

unintentionally changing the state of any other pins in the same port group by a single, atomic 8-, 16- or

32-bit write.

The PORT is connected to the high-speed bus matrix through an AHB/APB bridge.

32.2 Features

• Selectable Input and Output Configuration for Each Individual Pin

• Software-controlled Multiplexing of Peripheral Functions on I/O Pins

• Flexible Pin Configuration Through a Dedicated Pin Configuration Register

• Configurable Output Driver and Pull Settings:

– Totem-pole (push-pull)

– Pull configuration

– Driver strength

• Configurable Input Buffer and Pull Settings:

– Internal pull-up or pull-down

– Input sampling criteria

– Input buffer can be disabled if not needed for lower power consumption

– Read-Modify-Write support for output value (OUTCLR/OUTSET/OUTGL) and pin direction

(DIRCLR/DIRSET/DIRTGL)

• Input Event:

– Up to four input event pins for each PORT group

– SET/CLEAR/TOGGLE event actions for each event input on output value of a pin

– Can be output to pin

SAM D5x/E5x Family Data Sheet

PORT - I/O Pin Controller

Datasheet

DS60001507E-page 883