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You now have a choice between a 32-bit ARM® Cortex®-M0+ based and an 8-bit AVR core microcontroller to go with a best-in-class 2.4 GHz RF transceiver for all your Internet of Things (IoT) designs. The SAM R21 series, like its predecessors: the ATmegaxxxRFR2 and ATmegaxxxRFA1, are IEEE 802.15.4-compliant single-chip wireless solution that goes beyond all the benefits and features that you have become accustomed to, offering such as:
  • Enables you to easily scale your design with a wide range of memory densities offerings – 64K to 256K of Flash memory
  • Allows your battery operated devices to last longer by just consuming 70µA/MHz in active mode; consumes up to 50% less current compared to the next best offerings in the market
  • Allows greater design flexibility in interface mix and PCB routing with a richer set of peripherals, such as the inclusion of the serial communication modules (SERCOM) configurable as UART/USART, SPI or I2C
  • Addresses higher performance applications by operating up to 48MHz and offering a RF link budget of 105dBm

All of these improved benefits are built on top of a solid foundation established by the 8-bit AVR wireless microcontrollers that you’ve come to love over the years, with features such as:

  • The advanced hardware-assisted reduced power consumption (RPC) capability
  • A variety of power-down modes, such as a wake-on-radio feature, which keeps the RF transceiver active while the microcontroller sleeps, further enhances efficiency.
  • Antenna diversity feature enhances reliability by automatically selecting the best signal from two antennas for each incoming frame

Last but not least, system development is still extremely easy with the support of free Atmel software stacks, Wireless Composer, libraries and hardware evaluation and development kits.

32-bit ARM Cortex Based

Benefits

  • ARM Cortex M0+ based MCU running up to 48MHz
  • Up to 256KB embedded Flash
  • 512KB integrated Serial Flash for OTA (ATSAMR21E19A)
  • Low power consumption at <70µA/MHz
  • 12-channel DMA and event system
  • Up to four serial communication modules (SERCOM)
  • Full-Speed USB Device and embedded Host
  • 12-bit ADC
  • Hardware touch support
  • Ultra-low power 2.4GHz transceiver
  • Antenna diversity
  • AES 128-bit hardware encryption
  • External RF front-end Control
  • High-temperature version (-40°C to +125°C)

Description

The SAM R21 is a series of feature-rich, extremely low-power 2.4GHz wireless Cortex M0+MCUs that are designed for industrial and consumer wireless applications, either running proprietary communication stacks or solutions compliant to the IEEE 802.15.4 standard.
Device Description
SAM R30E Single-chip ARM® Cortex®-M0+ based 32-bit Microcontroller with Low Power Sub-GHz Transceiver for IEEE 802.15.4 Applications with 256K Flash and 32KB RAM in a 5x5 QFN32 package
SAM R30G Single-chip ARM® Cortex®-M0+ based 32-bit Microcontroller with Low Power Sub-GHz Transceiver for IEEE 802.15.4 Applications with 256K Flash and 32KB RAM in a 7x7 QFN48 package.
ATSAMR21E16A Single-chip ARM® Cortex®-M0+ based 32-bit Microcontroller with Low Power 2.4GHz Transceiver for IEEE 802.15.4 and ZigBee Applications with 64KB Flash and 16 I/O pins in a QFN32 package.
ATSAMR21E17A Single-chip ARM® Cortex®-M0+ based 32-bit Microcontroller with Low Power 2.4GHz Transceiver for IEEE 802.15.4 and ZigBee Applications with 128KB Flash and 16 I/O pins in a QFN32 package.
ATSAMR21E18A Single-chip ARM® Cortex®-M0+ based 32-bit Microcontroller with Low Power 2.4GHz Transceiver for IEEE 802.15.4 and ZigBee Applications with 256KB Flash and 16 I/O pins in a QFN32 package.
ATSAMR21E19A Single-chip ARM® Cortex®-M0+ based 32-bit Microcontroller with Low Power 2.4GHz Transceiver for IEEE 802.15.4 and ZigBee Applications with 256KB(512KB) Flash and 16 I/O pins in a QFN32 package.
ATSAMR21G16A Single-chip ARM® Cortex®-M0+ based 32-bit Microcontroller with Low Power 2.4GHz Transceiver for IEEE 802.15.4 and ZigBee Applications with 64KB Flash and 28 I/O pins in a QFN48 package.
ATSAMR21G17A Single-chip ARM® Cortex®-M0+ based 32-bit Microcontroller with Low Power 2.4GHz Transceiver for IEEE 802.15.4 and ZigBee Applications with 128KB Flash and 28 I/O pins in a QFN48 package.
ATSAMR21G18A Single-chip ARM® Cortex®-M0+ based 32-bit Microcontroller with Low Power 2.4GHz Transceiver for IEEE 802.15.4 and ZigBee Applications with 256KB Flash and 28 I/O pins in a QFN48 package.

8-bit AVR Based

Benefits

  • 8-bit AVR® based MCU enabling ultra-low power consumption
  • Excellent RF performance
  • Ultra-low power 2.4GHz transceiver
  • 103.5 dB power budget
  • Operation from 1.8V to 3.6V
  • RX override
  • PSD mask shaping
  • Antenna diversity
  • AES 128-bit hardware encryption
  • External RF front-end Control
  • High-temperature version (-40°C to +125°C)

Description

The AtmegaRFR2 series combines the industry's leading AVR 8-bit microcontroller and a best-in-class 2.4GHz RF transceiver in industry's best single-chip targeting IEEE 802.15.4 and ZigBee applications.
Device Description
ATmega2564RFR2 Single-chip 8-bit Microcontroller with Low Power 2.4GHz Transceiver for IEEE 802.15.4 and ZigBee Applications with 256KB Flash and 33 I/O pins..
ATmega256RFR2 Single-chip 8-bit Microcontroller with Low Power 2.4GHz Transceiver for IEEE 802.15.4 and ZigBee Applications with 256KB Flash and 38 I/O pins.
ATmega1284RFR2 Single-chip 8-bit Microcontroller with Low Power 2.4GHz Transceiver for IEEE 802.15.4 and ZigBee Applications with 128KB Flash and 33 I/O pins.
ATmega128RFR2 Single-chip 8-bit Microcontroller with Low Power 2.4GHz Transceiver for IEEE 802.15.4 and ZigBee Applications with 128KB Flash and 38 I/O pins.
ATmega644RFR2 Single-chip 8-bit Microcontroller with Low Power 2.4GHz Transceiver for IEEE 802.15.4 and ZigBee Applications with 64KB Flash and 33 I/O pins.
ATmega64RFR2 Single-chip 8-bit Microcontroller with Low Power 2.4GHz Transceiver for IEEE 802.15.4 and ZigBee Applications with 64KB Flash and 38 I/O pins.
ATmega128RFA1 Single-chip 8-bit Microcontroller with Low Power 2.4GHz Transceiver for IEEE 802.15.4 and ZigBee Applications with 128KB Flash and 38 I/O pins.

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