SAM4S 查看數據表（PDF） - Atmel Corporation

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SAM4S

AT91SAM ARM-based Flash MCU

Atmel Corporation 

Figure 5-1. Single Supply

Main Supply

(1.8V-3.6V)

VDDIO

VDDIN

VDDOUT

VDDCORE

VDDPLL

USB

Transceivers.

ADC, DAC

Analog Comp.

Voltage

Regulator

Note:

Restrictions

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

For ADC, VDDIN needs to be greater than 2.0V.

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

Figure 5-2.

Core Externally Supplied

Main Supply

(1.62V-3.6V)

VDDIO

Can be the

same supply

ADC, DAC, Analog

Comparator Supply

(2.0V-3.6V)

VDDCORE Supply

(1.08V-1.32V)

VDDIN

VDDOUT

VDDCORE

VDDPLL

USB

Transceivers.

ADC, DAC

Analog Comp.

Voltage

Regulator

Note:

Restrictions

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

For ADC, VDDIN needs to be greater than 2.0V.

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

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.

20 SAM4S Series [Preliminary]

11100BS–ATARM–31-Jul-12

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