Atmel ARM-Based Evaluation Kit for SAM4S16C, 32-Bit ARM® Cortex® Microcontroller ATSAM4S-WPIR-RD ATSAM4S-WPIR-RD Data Sheet

Product codes

ATSAM4S-WPIR-RD

SAM4S Series [DATASHEET]

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

5.3

Typical Powering Schematics

The SAM4S supports a 1.62V-3.6V single supply mode. The internal regulator input is connected to the source

and its output feeds VDDCORE.

Figure 5-1

below

shows the power schematics.

As VDDIN powers the voltage regulator, the ADC, DAC and the analog comparator, when the user does not want

to use the embedded voltage regulator, it can be disabled by software via the SUPC (note that this is different from

Backup mode).

Figure 5-1.

Single Supply

Note:

Restrictions:

For USB, VDDIO needs to be greater than 3.0V.

For ADC and DAC, VDDIN needs to be greater than 2.4V.

Figure 5-2.

Core Externally Supplied

Note:

Restrictions:

For USB, VDDIO needs to be greater than 3.0V.

For ADC and DAC, VDDIN needs to be greater than 2.4V.

Main Supply
(1.62V-3.6V)

ADC, DAC

Analog Comp.

USB

Transceivers.

VDDIN

Voltage

Regulator

VDDOUT

VDDCORE

VDDIO

VDDPLL

Main Supply
(1.62V–3.6V)

Can be the
same supply

VDDCORE Supply
(1.08V–1.32V)

ADC, DAC, Analog
Comparator Supply
(2.4V–3.6V)