Datasheet

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SAM4S Series [DATASHEET]

Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14

Note: 1. Schmitt triggers can be disabled through PIO registers.

2. Some PIO lines are shared with system I/Os.

3. Refer to USB section of the product Electrical Characteristics for information on pull-down value in USB mode.

4. See “Typical Powering Schematics” section for restrictions on voltage range of analog cells.

5. TDO pin is set in input mode when the Cortex-M4 processor is not in debug mode. Thus the internal pull-up corresponding

to this PIO line must be enabled to avoid current consumption due to floating input

Two-Wire Interface- TWI

TWDx TWIx Two-wire Serial Data I/O – – –

TWCKx TWIx Two-wire Serial Clock I/O – – –

Analog

ADVREF

ADC, DAC and Analog Comparator

Reference

Analog – – –

12-bit Analog-to-Digital Converter - ADC

AD0–AD14 Analog Inputs

Analog,

Digital

–– –

ADTRG ADC Trigger Input – VDDIO –

12-bit Digital-to-Analog Converter - DAC

DAC0–DAC1 Analog output

Analog,

Digital

–– –

DACTRG DAC Trigger Input – VDDIO –

Fast Flash Programming Interface - FFPI

PGMEN0-

PGMEN2

Programming Enabling Input – VDDIO –

PGMM0–PGMM3 Programming Mode Input –

VDDIO

–

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 Full Speed Device

DDM USB Full Speed Data -

Analog,

Digital

– VDDIO

Reset State:

- USB Mode

- Internal Pull-down

(3)

DDP USB Full Speed Data +

Table 3-1. Signal Description List (Continued)

Signal Name Function Type

Active

Level

Voltage

Reference Comments