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Atmel | SMART SAM R21 [PRELIMINARY DATASHEET SUMMARY]

Atmel-42223AS–SAM-R21_Summary–07/2014

3.

Block Diagrams

3.1

MCU Block Diagram

Notes: 1. Some products have different number of SERCOM instances, Timer/Counter instances, PTC signals and ADC sig-

nals. Refer to “Ordering Information” on page 6 for details.

2. The three TCC instances have different configurations, including the number of Waveform Output (WO) lines.

3. Refer to the PORT Function Multiplexing Table 5-1 for details about the available GCLK_IO and ADC signals.

4. Only available for SAM R21G.

6 x SERCOM

8 x Timer Counter

REAL TIME

COUNTER

AHB-APB

BRIDGE C

M

M

HIGH SPEED

BUS MATRIX

WATCHDOG

TIMER

SERIAL

WIRE

SWDIO

S

CORTEX-M0+

PROCESSOR

Fmax 48 MHz

SWCLK

DEVICE

SERVICE

UNIT

AHB-APB

BRIDGE A

8-CHANNEL

12-bit ADC 350KSPS

AIN[n]

AIN[3..0]

S

SRAM

CONTROLLER

32/16/8KB

RAM

M

RESET

CONTROLLER

SLEEP

CONTROLLER

CLOCK

CONTROLLER

POWER MANAGER

RESETN

3 x TIMER / COUNTER

S

5x SERCOM

2 ANALOG

COMPARATORS

SYSTEM CONTROLLER

OSCULP32K

OSC32K

OSC8M

DFLL48M

BOD33

VREF

X[7..0]

Y[5..0]

PERIPHERAL

TOUCH

CONTROLLER

PERIPHERAL

ACCESS CONTROLLER

AHB-APB

BRIDGE B

EXTERNAL INTERRUPT

CONTROLLER

PERIPHERAL

ACCESS CONTROLLER

PERIPHERAL

ACCESS CONTROLLER

EXTINT[15..1]

NMI

GCLK_IO[n]

S

XOUT

XIN

XOUT32

XIN32

XOSC32K

XOSC

PAD0

WO1

PAD1

PAD2

PAD3

WO0

VREFB

256/128/64KB

NVM

NVM

CONTROLLER

Cache

M

DMA

USB FS

DEVICE

MINI-HOST

DP

DM

3x TIMER / COUNTER

FOR CONTROL

WOn

IOBUS

FDPLL96M

DMA

DMA

DMA

DMA

S

SOF 1KHZ

WO0

WO1

(2)

(3)

(3)

GENERIC CLOCK

CONTROLLER

(4)