SAM-R21E_14 datasheet(4/22 Pages) ATMEL

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Atmel | SMART SAM R21 [PRELIMINARY DATASHEET SUMMARY]

Atmel-42223AS–SAM-R21_Summary–07/2014

Configuration Summary

SAM R21G

SAM R21E

Pins

General Purpose I/O-pins (GPIOs)

Flash

256/128/64KB

SRAM

32/16/8KB

Timer Counter (TC) instances

Waveform output channels per TC instance

Timer Counter for Control (TCC) instances

Waveform output channels per TCC

4/4/2

DMA channels

USB interface

Serial Communication Interface (SERCOM) instances

5+1(1)

4+1(1)

Inter-IC Sound (I2S) interface

Analog-to-Digital Converter (ADC) channels

Analog Comparators (AC)

Digital-to-Analog Converter (DAC)

channels

Real-Time Counter (RTC)

Yes

RTC alarms

RTC compare values

1 32-bit value or

2 16-bit values

1 32-bit value or

2 16-bit values

External Interrupt lines

Peripheral Touch Controller (PTC) X and Y lines

8x6

6x2

Maximum CPU frequency

48MHz

Packages

QFN

32.768kHz crystal oscillator (XOSC32K)

Yes

Oscillators

16MHz crystal oscillator for 2.4GHz TRX (XOSCRF)

0.4-32MHz crystal oscillator (XOSC)

32.768kHz internal oscillator (OSC32K)

32kHz ultra-low-power internal oscillator (OSCULP32K)

8MHz high-accuracy internal oscillator (OSC8M)

48MHz Digital Frequency Locked Loop (DFLL48M)

96MHz Fractional Digital Phased Locked Loop (FDPLL96M)

Event System channels

SW Debug Interface

Yes

Watchdog Timer (WDT)

Yes

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