ATSAM3S datasheet(18/65 Pages) ATMEL

18 / 65 page

6500AS–ATARM–11-Dec-09

SAM3S Summary

Figure 5-1.

Single Supply

Note:

Restrictions

With Main Supply < 2.4 V, USB and ADC/DAC and Analog comparator are not usable.

With Main Supply

≥ 2.4V and < 3V, USB is not usable.

With Main Supply

≥ 3V, all peripherals are usable.

Figure 5-2.

Core Externally Supplied

Note:

Restrictions

With Main Supply < 2.4 V, USB and ADC/DAC and Analog comparator are not usable.

With Main Supply

≥ 2.4V and < 3V, USB is not usable.

With Main Supply

≥ 3V, all peripherals are usable.

Figure 5-3 below provides an example of the powering scheme when using a backup battery.

Since the PIO state is preserved when in backup mode, any free PIO line can be used to switch

off the external regulator by driving the PIO line at low level (PIO is input, pull-up enabled after

backup reset). External wake-up of the system can be from a push button or any signal. See

Section 5.6 “Wake-up Sources” for further details.

Main Supply

(1.8V-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

(1.62V-1.95V)

ADC, DAC, Analog

Comparator Supply

(2.4V-3.6V)

ADC, DAC

Analog Comp.

USB

Transceivers.

VDDIN

Voltage

Regulator

VDDOUT

VDDCORE

VDDIO

VDDPLL

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