SAMD21 DATA SHEET – ARM-Based Microcontroller – Atmel

Part number : SAMD21, ATSAMD21G18, SAMD21J, SAMD21G, SAMD21E

Functions : SMART ARM-Based Microcontroller

Package information : 48-pin TQFP, 32-pin TQFP, 32-pin TQFP

Manufacturer : ATMEL, Microchip

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SAMD21 DATA SHEET Microcontroller


The Atmel SMART SAMD21 is a series of low-power microcontrollers using the 32-bit ARM Cortex-M0+ processor, and ranging from 32- to 64-pins with up to 256KB Flash and 32KB of SRAM. The SAM D21 devices operate at a maximum frequency of 48MHz and reach 2.46 Coremark/MHz. They are designed for simple and intuitive migration with identical peripheral modules, hex compatible code, identical linear address map and pin compatible migration paths between all devices in the product series. All devices include intelligent and flexible peripherals, Atmel Event System for inter-peripheral signaling, and support for capacitive touch button, slider and wheel user interfaces.


SAMD21 pinout datasheet


1. 256KB of flash and 32KB of SRAM
2. Up to 48MHz operating frequency
3. Six serial communication modules (SERCOM) configurable as UART/USART, SPI or I2C, three 16-bit timer/counters, 32-bit Real-Time Clock and calendar, 20 PWM channels, one 14-channel 12-bit ADC, one 10-bit DAC
4. Full Speed USB Device and embedded Host
5. Support for up to 120 touch channels
6. 1.62V to 3.63V power supply
7. Easy pin migration to SAMD21G and SAMD21J devices
8. Supported by Atmel Studio, ASF and the SAM D21 Xplained Pro kit

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Ordering Information


SAMD21 Datasheet PDF File