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Atmel | SMART SAM R21 [PRELIMINARY DATASHEET SUMMARY]

Atmel-42223AS–SAM-R21_Summary–07/2014

3.2

SAM R21 Interconnection

SAMR21

AT86RF233

SAMD21

SPI

(Slave)

SERCOM 4

XOSC

RF

AVREG

2.4GHz TRX (analog)

DIG3

AVSS

AVSS

XTAL1

XTAL2

EXTERNAL

INTERRUPT

CONTROLLER

Control Logic

GENERIC

CLOCK

ADC

DVREG

DVSS

DVDD

DEVDD

TRX (digital)

PORT

SLP_TR

RSTN

DIG2

DIG1

DIG4

2.4 GHz RF

front-end circuit

FECTRL0..1

AC

XOSC

32K

VREG

DVDD

XTAL1

XTAL2

GNDANA

VDDIO

AVDD

AVDD

EVDD

VDDANA

GNDANA

EXTINT0

PA20

PB15

GCLK_IO1

PTC

FECTRL2..5

(1)

Notes:

RFCTRL

DIG1..4

1. Paddle connected to digital ground DVSS, GND.

2. Only available for SAM R21G.

3. Dedicated SERCOM4 alternate pin function mapping for internally connected AT86RF233.

4. Die revision A uses GCLK_IO5.

(3)

(4)