Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK Data Sheet

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SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]

11063K–ATARM–05-Nov-13

Each I/O line controlled by the PIO Controller is associated with a bit in each of the PIO Controller User Interface
registers. Each register is 32 bits wide. If a parallel I/O line is not defined, writing to the corresponding bits has no effect.
Undefined bits read zero. If the I/O line is notmultiplexed with any peripheral, the I/O line is controlled by the PIO
Controller and PIO_PSR returns one systematically.

0x0000

PIO Enable Register

PIO_PER

Write-only

–

0x0004

PIO Disable Register

PIO_PDR

Write-only

–

0x0008

PIO Status Register 

PIO_PSR

Read-only

0x000C

Reserved

–

–

–

0x0010

Output Enable Register

PIO_OER

Write-only

–

0x0014

Output Disable Register

PIO_ODR

Write-only

–

0x0018

Output Status Register

PIO_OSR

Read-only

0x0000 0000

0x001C

Reserved

–

–

–

0x0020

Glitch Input Filter Enable Register

PIO_IFER

Write-only

–

0x0024

Glitch Input Filter Disable Register

PIO_IFDR

Write-only

–

0x0028

Glitch Input Filter Status Register

PIO_IFSR

Read-only

0x0000 0000

0x002C

Reserved

–

–

–

0x0030

Set Output Data Register

PIO_SODR

Write-only

–

0x0034

Clear Output Data Register

PIO_CODR

Write-only

0x0038

Output Data Status Register

PIO_ODSR

Read-only 

Read/Write

–

0x003C

Pin Data Status Register

PIO_PDSR

Read-only

0x0040

Interrupt Enable Register

PIO_IER

Write-only

–

0x0044

Interrupt Disable Register

PIO_IDR

Write-only

–

0x0048

Interrupt Mask Register

PIO_IMR

Read-only

0x00000000

0x004C

Interrupt Status Register

PIO_ISR

Read-only

0x00000000

0x0050

Multi-driver Enable Register

PIO_MDER

Write-only

–

0x0054

Multi-driver Disable Register

PIO_MDDR

Write-only

–

0x0058

Multi-driver Status Register

PIO_MDSR

Read-only

0x00000000

0x005C

Reserved

–

–

–

0x0060

Pull-up Disable Register

PIO_PUDR

Write-only

–

0x0064

Pull-up Enable Register

PIO_PUER

Write-only

–

0x0068

Pad Pull-up Status Register

PIO_PUSR

Read-only

0x006C

Reserved –

–

–

0x0070

Peripheral Select Register 1

PIO_ABCDSR1

Read/Write

0x00000000

0x0074

Peripheral Select Register 2

PIO_ABCDSR2

Read/Write

0x00000000

0x0078
to
0x007C

Reserved

–

–

–

0x0080

Input Filter Slow Clock Disable Register

PIO_IFSCDR

Write-only

–

0x0084

Input Filter Slow Clock Enable Register

PIO_IFSCER

Write-only

–

0x0088

Input Filter Slow Clock Status Register

PIO_IFSCSR

Read-only

0x00000000