ATSAM3A View Datasheet(PDF) - Atmel Corporation

Part Name

Description

MFG CO.

ATSAM3A

AT91SAM ARM-based Flash MCU

Atmel Corporation 

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Table 3-1. Signal Description List (Continued)

Signal Name

TCK/SWCLK

TDI

TDO/TRACESWO

TMS/SWDIO

Function

Type

ICE and JTAG

Test Clock/Serial Wire Clock

Input

Test Data In

Input

Test Data Out / Trace Asynchronous Data

Out

Output

Test Mode Select /Serial Wire

Input/Output

Input / I/O

Active

Level

Voltage

Reference

VDDIO

JTAGSEL

JTAG Selection

Input

High

VDDBU

ERASE

NRST

NRSTB

TST

URXD

UTXD

Flash Memory

Flash and NVM Configuration Bits

Erase Command

Input

High

Reset/Test

Microcontroller Reset

I/O

Low

Asynchronous Microcontroller Reset

Input

Low

Test Mode Select

Input

Universal Asynchronous Receiver Transceiver - UART

UART Receive Data

Input

UART Transmit Data

Output

VDDIO

VDDIO

VDDBU

VDDBU

Comments

Reset State:

- SWJ-DP Mode

- Internal pull-up

disabled(1)

Permanent Internal

pull-down

Pull-down resistor

Pull-up resistor

Pull-up resistor

Pull-down resistor

10 SAM3X/A

11057BS–ATARM–13-Jul-12

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