7

Atmel SAM D20 [DATASHEET Summary]

42129JS–SAM–12/2013

3.

Block Diagram

Notes:

1.

Some products have different number of SERCOM instances, Timer/Counter instances, PTC signals and ADC signals. Refer to “Configuration Summary” on

page 3 for details.

6 x SERCOM

8 x Timer Counter

REAL TIME

COUNTER

AHB-APB

BRIDGE C

M

S

HIGH SPEED

BUS MATRIX

WATCHDOG

TIMER

SERIAL

WIRE

SWDIO

NVM

CONTROLLER

256/128/64/32/16KB

FLASH

S

ARM CORTEX-M0+

PROCESSOR

SWCLK

DEVICE

SERVICE

UNIT

AHB-APB

BRIDGE A

ADC

AIN[19:0]

VREFA

AIN[3:0]

S

32/16/8/4/2KB

RAM

M

RESET

CONTROLLER

SLEEP

CONTROLLER

CLOCK

CONTROLLER

POWER MANAGER

RESET

8 x TIMER COUNTER

S

6 x SERCOM

2 ANALOG

COMPARATORS

SYSTEM CONTROLLER

XOUT

XIN

XOUT32

XIN32

OSCULP32K

OSC32K

OSC8M

DFLL48M

BOD33

XOSC32K

XOSC

VREF

GENERIC CLOCK

X[15:0]

Y[15:0]

PERIPHERAL

TOUCH

CONTROLLER

PERIPHERAL

ACCESS CONTROLLER

AHB-APB

BRIDGE B

VREFP

VOUT

DAC

EXTERNAL INTERRUPT

CONTROLLER

PERIPHERAL

ACCESS CONTROLLER

PERIPHERAL

ACCESS CONTROLLER

EXTINT[15:0]

NMI

GCLK_IO[7:0]

S

PIN[3:0]

WO[1:0]

VREFB

(See Note1)

CMP1:0]

ARM SINGLE CYCLE IOBUS

CONTROLLER