ATSAM3S datasheet(36/65 Pages) ATMEL

36 / 65 page

6500AS–ATARM–11-Dec-09

SAM3S Summary

Figure 10-1. System Controller Block Diagram

Software Controlled

Voltage Regulator

Matrix

SRAM

Watchdog

Timer

Cortex-M3

Flash

Peripherals

Peripheral

Bridge

Zero-Power

Power-on Reset

Supply

Monitor

(Backup)

RTC

Power

Management

Controller

Embedded

32 kHz RC

Oscillator

Xtal 32 kHz

Oscillator

Supply

Controller

Brownout

Detector

(Core)

Reset

Controller

Backup Power Supply

Core Power Supply

PLLA

vr_on

vr_mode

out

rtc_alarm

SLCK

rtc_nreset

proc_nreset

periph_nreset

ice_nreset

Master Clock

MCK

SLCK

NRST

MAINCK

FSTT0 - FSTT15

XIN32

XOUT32

osc32k_xtal_en

Slow Clock

SLCK

osc32k_rc_en

VDDIO

VDDCORE

VDDOUT

ADVREF

ADx

WKUP0 - WKUP15

bod_core_on

lcore_brown_out

RTT

rtt_alarm

SLCK

rtt_nreset

XIN

XOUT

VDDIO

VDDIN

PIOx

USB

Transeivers

VDDIO

DDP

DDM

MAINCK

DAC Analog

Circuitry

DACx

PLLB

PLLBCK

PLLACK

Embedded

12 / 8 / 4 MHz

Oscillator

Main Clock

MAINCK

SLCK

3 - 20 MHz

XTAL Oscillator

FSTT0 - FSTT15 are possible Fast Startup Sources, generated by WKUP0-WKUP15 Pins,

but are not physical pins.

VDDIO

XTALSEL

General Purpose

Backup Registers

vddcore_nreset

PIOA/B/C

Input/Output Buffers

ADC Analog

Circuitry

Analog

Comparator

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