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AT91SAM9263_1 Datasheet, PDF (425/1110 Pages) ATMEL Corporation – AT91 ARM Thumb Microcontrollers | |||
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AT91SAM9263 Preliminary
31. Parallel Input/Output Controller (PIO)
31.1 Overview
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:
⢠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 pull-up 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.
6249HâATARMâ27-Jul-09
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