AT91SAM7S32-AI ATMEL [ATMEL Corporation], AT91SAM7S32-AI Datasheet - Page 197

• Manufacturer Part Number: AT91SAM7S32-AI
• Description: AT91 ARM Thumb-based Microcontrollers
• Manufacturer: ATMEL [ATMEL Corporation]

Parallel Input/Output Controller (PIO)
Overview
6071A–ATARM–28-Oct-04
The Parallel Input/Output Controller (PIO) manages up to 32 fully programmable input/output
lines. Each I/O line may be dedicated as a general-purpose I/O or be assigned to a function of
an embedded peripheral. This assures effective optimization of the pins of a product.
Each I/O line is associated with a bit number in all of the 32-bit registers of the 32-bit wide
User Interface.
Each I/O line of the PIO Controller features:
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The PIO Controller also features a synchronous output providing up to 32 bits of data output in
a single write operation.
An input change interrupt enabling level change detection on any I/O line.
A glitch filter providing rejection of pulses lower than one-half of clock cycle.
Multi-drive capability similar to an open drain I/O line.
Control of the the pull-up of the I/O line.
Input visibility and output control.
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