SAM3U_14 datasheet(8/60 Pages) ATMEL

部件名	SAM3U

功能描述	From 64 to 256 Kbytes embedded Flash

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制造商	ATMEL [ATMEL Corporation]

网页	http://www.atmel.com

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8 / 60 page

8

6430FS–ATARM–10-Feb-12

SAM3U Series

Notes:

1. PIOA: Schmitt Trigger on all except PA14 on 100 and 144 packages.

2. PIOB: Schmitt Trigger on all except PB9 to PB16, PB25 to PB31 on 100 and 144 packages.

3. PIOC: Schmitt Trigger on all except PC20 to PC27 on 144 package.

4. TDO pin is set in input mode when the Cortex-M3 Core is not in debug mode. Thus an external pull-up (100 k

Ω) must be

added to avoid current consumption due to floating input.

3.1

Design Considerations

In order to facilitate schematic capture when using a SAM3U design, Atmel provides a “Sche-

matics Checklist” Application note.

Please visit http://www.atmel.com/products/AT91/ for additional documentation.

Two-Wire Interface - TWI

TWDx

TWIx Two-wire Serial Data

I/O

TWCKx

TWIx Two-wire Serial Clock

I/O

12-bit Analog-to-Digital Converter - ADC12B

AD12Bx

Analog Inputs

Analog

AD12BTRG

ADC Trigger

Input

AD12BVREF

ADC Reference

Analog

10-bit Analog-to-Digital Converter - ADC

ADx

Analog Inputs

Analog

ADTRG

ADC Trigger

Input

ADVREF

ADC Reference

Analog

Fast Flash Programming Interface - FFPI

PGMEN0-PGMEN2 Programming Enabling

Input

VDDIO

PGMM0-PGMM3

Programming Mode

Input

PGMD0-PGMD15

Programming Data

I/O

PGMRDY

Programming Ready

Output

High

PGMNVALID

Data Direction

Output

Low

PGMNOE

Programming Read

Input

Low

PGMCK

Programming Clock

Input

PGMNCMD

Programming Command

Input

Low

USB High Speed Device - UDPHS

DFSDM

USB Device Full Speed Data -

Analog

VDDUTMII

DFSDP

USB Device Full Speed Data +

Analog

DHSDM

USB Device High Speed Data -

Analog

DHSDP

USB Device High Speed Data +

Analog

Table 3-1.

Signal Description List (Continued)

Signal Name

Function

Type

Active

Level

Voltage

Reference

Comments

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