AT91SAM9261 datasheet(5/43 Pages) ATMEL

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6062KS–ATARM–15-Jan-09

AT91SAM9261 Preliminary

Signal Description

Table 3-1.

Signal Description by Peripheral

Signal Name

Function

Type

Active Level

Comments

Power

VDDIOM

EBI I/O Lines Power Supply

Power

1.65 V to 1.95V and 3.0V to 3.6V

VDDIOP

Peripherals I/O Lines Power Supply

Power

2.7V to 3.6V

VDDBU

Backup I/O Lines Power Supply

Power

1.08V to 1.32V

VDDPLL

PLL Power Supply

Power

3.0V to 3.6V

VDDOSC

Oscillator Power Supply

Power

3.0V to 3.6V

VDDCORE

Core Chip Power Supply

Power

1.08V to 1.32V

GND

Ground

GNDPLL

PLL Ground

Ground

GNDOSC

Oscillator Ground

Ground

GNDBU

Backup Ground

Ground

Clocks, Oscillators and PLLs

XIN

Main Oscillator Input

Input

XOUT

Main Oscillator Output

Output

XIN32

Slow Clock Oscillator Input

Input

XOUT32

Slow Clock Oscillator Output

Output

PLLRCA

PLL Filter

Input

PLLRCB

PLL Filter

Input

PCK0 - PCK3

Programmable Clock Output

Output

Shutdown, Wakeup Logic

SHDN

Shutdown Control

Output

Do not tie over VDDBU.

WKUP

Wake-Up Input

Input

Accepts between 0V and VDDBU.

ICE and JTAG

TCK

Test Clock

Input

No pull-up resistor.

RTCK

Returned Test Clock

Output

No pull-up resistor.

TDI

Test Data In

Input

No pull-up resistor.

TDO

Test Data Out

Output

TMS

Test Mode Select

Input

No pull-up resistor.

NTRST

Test Reset Signal

Input

Low

Pull-up resistor.

JTAGSEL

JTAG Selection

Input

Pull-down resistor. Accepts

between 0V and VDDBU.

ETM

™

TSYNC

Trace Synchronization Signal

Output

TCLK

Trace Clock

Output

TPS0 - TPS2

Trace ARM Pipeline Status

Output

TPK0 - TPK15

Trace Packet Port

Output

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