AT91SAM9261S_09 datasheet(6/39 Pages) ATMEL

Part #	AT91SAM9261S

Description	AT91 ARM Thumb-based Microcontrollers

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Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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6

6242ES–ATARM–11-Sep-09

AT91SAM9261S

AIC

IRQ0 - IRQ2

External Interrupt Inputs

Input

FIQ

Fast Interrupt Input

Input

PIO

PA0 - PA31

Parallel IO Controller A

I/O

Pulled-up input at reset

PB0 - PB31

Parallel IO Controller B

I/O

Pulled-up input at reset

PC0 - PC31

Parallel IO Controller C

I/O

Pulled-up input at reset

EBI

D0 - D31

Data Bus

I/O

Pulled-up input at reset

A0 - A25

Address Bus

Output

0 at reset

NWAIT

External Wait Signal

Input

Low

SMC

NCS0 - NCS7

Chip Select Lines

Output

Low

NWR0 - NWR3

Write Signal

Output

Low

NRD

Read Signal

Output

Low

NWE

Write Enable

Output

Low

NBS0 - NBS3

Byte Mask Signal

Output

Low

CompactFlash Support

CFCE1 - CFCE2

CompactFlash Chip Enable

Output

Low

CFOE

CompactFlash Output Enable

Output

Low

CFWE

CompactFlash Write Enable

Output

Low

CFIOR

CompactFlash IO Read

Output

Low

CFIOW

CompactFlash IO Write

Output

Low

CFRNW

CompactFlash Read Not Write

Output

CFCS0 - CFCS1

CompactFlash Chip Select Lines

Output

Low

NAND Flash Support

NANDOE

NAND Flash Output Enable

Output

Low

NANDWE

NAND Flash Write Enable

Output

Low

NANDCS

NAND Flash Chip Select

Output

Low

SDRAM Controller

SDCK

SDRAM Clock

Output

SDCKE

SDRAM Clock Enable

Output

High

SDCS

SDRAM Controller Chip Select

Output

Low

BA0 - BA1

Bank Select

Output

SDWE

SDRAM Write Enable

Output

Low

RAS - CAS

Row and Column Signal

Output

Low

SDA10

SDRAM Address 10 Line

Output

Multimedia Card Interface

MCCK

Multimedia Card Clock

Output

MCCDA

Multimedia Card A Command

I/O

MCDA0 - MCDA3

Multimedia Card A Data

I/O

Table 3-1.

Signal Description by Peripheral (Continued)

Signal Name

Function

Type

Active Level

Comments

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AT91SAM9261S Datasheet(PDF) 6 Page - ATMEL Corporation

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