AT32UC3A0512_14 datasheet(39/98 Pages) ATMEL

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AT32UC3A0512 Datasheet(PDF) 39 Page - ATMEL Corporation

Part #	AT32UC3A0512

Description	High Performance, Low Power 32-Bit Atmel AVR Microcontroller

Download	98 Pages

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Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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39 / 98 page

AT32UC3A

11. Boot Sequence

This chapter summarizes the boot sequence of the AT32UC3A. The behaviour after power-up is

controlled by the Power Manager. For specific details, refer to Section 13. ”Power Manager

(PM)” on page 53.

11.1

Starting of clocks

After power-up, the device will be held in a reset state by the Power-On Reset circuitry, until the

power has stabilized throughout the device. Once the power has stabilized, the device will use

the internal RC Oscillator as clock source.

On system start-up, the PLLs are disabled. All clocks to all modules are running. No clocks have

a divided frequency, all parts of the system recieves a clock with the same frequency as the

internal RC Oscillator.

11.2

Fetching of initial instructions

After reset has been released, the AVR32 UC CPU starts fetching instructions from the reset

address, which is 0x8000_0000. This address points to the first address in the internal Flash.

The code read from the internal Flash is free to configure the system to use for example the

PLLs, to divide the frequency of the clock routed to some of the peripherals, and to gate the

clocks to unused peripherals.

32058KS–AVR32–01/12

Manufacturer	Part #	Datasheet	Description
ATMEL Corporation	AT32UC3A0512	11Mb / 826P	AVR32 32-Bit Microcontroller

Manufacturer	Part #	Datasheet	Description
ATMEL Corporation	AT32UC3A3256S	1Mb / 94P	High Performance, Low Power 32-bit Atmel AVR Microcontroller
	AT32UC3B0512	1Mb / 107P	High Performance, Low Power 32-Bit Atmel AVR Microcontroller
	AT32UC3L064	1Mb / 113P	High-performance, Low-power 32-bit Atmel AVR Microcontroller
	AT32UC3L0128	1Mb / 96P	32-bit Atmel AVR Microcontroller
	AT32UC3L064	1Mb / 111P	32-bit Atmel AVR Microcontroller
	AT32UC3L0256-D3HT	1Mb / 96P	32-bit Atmel AVR Microcontroller
	AT32UC3C0512C	2Mb / 110P	High Performance, Low Power 32-bit AVR Microcontroller
	AT32UC3C0512C	2Mb / 110P	High Performance, Low Power 32-bit AVR Microcontroller
	ATA5505	5Mb / 294P	High Performance, Low Power Atmel AVR 8-bit Microcontroller Advanced RISC Architecture
	ATMEGA64	7Mb / 414P	High-performance, Low-power Atmel AVR

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