AT91SAM7A3-AJ datasheet(9/32 Pages) ATMEL

Part #	AT91SAM7A3-AJ

Description	AT91 ARM Thumb-based Microcontrollers

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Manufacturer	ATMEL [ATMEL Corporation]

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9

Preliminary

AT91SAM7A3 Preliminary

6042AS–ATARM–23-Dec-04

Typical Powering

Schematics

3.3V Single Supply

The AT91SAM7A3 supports a 3.3V single supply mode. The internal regulator is con-

nected to the 3.3V source and its output feeds VDDCORE and VDDPLL. Figure 3

shows the power schematics to be used for USB bus-powered systems.

Figure 3. 3.3V System Single Power Supply Schematics

USB Connector

up to 5.5V

3.3V

VDDIN

Voltage

Regulator

VDDOUT

VDDIO

VDDANA

DC/DC Converter

VDDCORE

VDDPLL

VDDBU

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