Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO Data Sheet

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SAM4E [DATASHEET]

Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14

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 the 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:



An input change interrupt enabling level change detection on any I/O line.



Additional Interrupt modes enabling rising edge, falling edge, low-level or high-level detection on any I/O 
line.



A glitch filter providing rejection of glitches lower than one-half of peripheral clock cycle.



A debouncing filter providing rejection of unwanted pulses from key or push button operations.



Multi-drive capability similar to an open drain I/O line.



Control of the pull-up and pull-down of the I/O line.



Input visibility and output control.

The PIO Controller also features a synchronous output providing up to 32 bits of data output in a single write
operation.

An 8-bit parallel capture mode is also available which can be used to interface a CMOS digital image sensor, an
ADC, a DSP synchronous port in synchronous mode, etc.