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ATSAM3N1BA-AU

ARM-based Flash MCU

Atmel Corporation 

SAM3N Summary

Table 3-1. Signal Description List (Continued)

Signal Name

Function

Type

Active

Level

Serial Peripheral Interface - SPI

MISO

Master In Slave Out

I/O

MOSI

Master Out Slave In

I/O

SPCK

SPI Serial Clock

I/O

SPI_NPCS0

SPI Peripheral Chip Select 0

I/O

Low

SPI_NPCS1 -

SPI_NPCS3

SPI Peripheral Chip Select

Output

Low

Two-Wire Interface- TWIx

TWDx

TWIx Two-wire Serial Data

I/O

TWCKx

TWIx Two-wire Serial Clock

I/O

Analog

ADVREF

ADC and DAC Reference

Analog

10-bit Analog-to-Digital Converter - ADC

AD0 - AD15

Analog Inputs

Analog

ADTRG

ADC Trigger

Input

Digital-to-Analog Converter Controller- DACC

DAC0

DACC channel analog output

Analog

DATRG

DACC Trigger

Input

Fast Flash Programming Interface

PGMEN0-PGMEN2 Programming Enabling

Input

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

Voltage

Reference Comments

VDDIO

VDDIO

VDDIO

Notes:

1. Schmitt Triggers can be disabled through PIO registers.

2. Some PIO lines are shared with System IOs.

3. See Section 5.3 “Typical Powering Schematics” for restriction on voltage range of Analog Cells.

9

11011BS–ATARM–22-Feb-12

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