AT91SAM7S64 datasheet(12/42 Pages) ATMEL

Part #	AT91SAM7S64

Description	AT91 ARM짰 Thumb짰-based Microcontrollers

PDF	42 Pages

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Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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6175BS–ATARM–04-Nov-05

AT91SAM7S Series Summary

possible. One external 2.2 µF (or 3.3 µF) X7R capacitor must be connected between VDDOUT

and GND.

Adequate input supply decoupling is mandatory for VDDIN in order to improve startup stability

and reduce source voltage drop. The input decoupling capacitor should be placed close to the

chip. For example, two capacitors can be used in parallel: 100 nF NPO and 4.7 µF X7R.

6.4

Typical Powering Schematics

The AT91SAM7S Series supports a 3.3V single supply mode. The internal regulator is con-

nected to the 3.3V source and its output feeds VDDCORE and the VDDPLL. Figure 6-1 shows

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

Figure 6-1.

3.3V System Single Power Supply Schematic

Power Source

ranges

from 4.5V (USB)

to 18V

3.3V

VDDIN

Voltage

Regulator

VDDOUT

VDDIO

DC/DC Converter

VDDCORE

VDDFLASH

VDDPLL

AT91SAM7S64 Datasheet(PDF) 12 Page - ATMEL Corporation