Theultra-low-power ATSAML21 based Flash microcontroller (MCU) featuresophisticated power management technologies and consumesunder 35 µA/MHz in active mode and 200nA in Sleep mode. In addition toultra-low-power performance, these devices feature Full Speed USB host anddevice, Event System and Sleepwalking, 12-bit analog, AES, capacitive touchsensing, built in opAmps and much more. 

Key Features:

  ARM Cortex-M0+ CPU running at up to 48MHz

  32 KB in-system self-programmable Flash

  1 KB Flash Read-While-Write section

  4 KB SRAM Main Memory

  2 KB SRAM Low power Memory

  Operating voltage: 1.62V – 3.63V

  Ultra Low Power Architecture consuming under 35uA/MHz in Active mode

  Idle, Standby, Backup, and Off sleep modes

  Battery backup support

  Two Performance Levels

  Embedded Buck/LDO regulator supporting on-the-fly selection

  Peripheral Touch Controller (PTC)

  Wake-up on touch in standby mode

  Two-pin Serial Wire Debug (SWD) programming, test and debugging interface

  Temperature Range - 40°C to 85°C, - 40°C to 105°C

Peripheral Features

  16-channel Direct Memory Access Controller (DMAC)

  12-channel Event System

  16-bit Timer/Counters (TC) including one low-power TC

  Two 24-bit and one 16-bit Timer/Counters for Control (TCC)

  32-bit Real Time Counter (RTC) with clock/calendar function

  Watchdog Timer (WDT)

  CRC-32 generator

  One full-speed (12Mbps) Universal Serial Bus (USB) 2.0 interface

  Up to six Serial Communication Interfaces (SERCOM) including one low-power SERCOM

  USART, I2C, SPI, LIN slave

  One AES Encryption Engine & TRNG

  One Configurable Custom Logic (CCL)

Advanced Analog:

  One 12-bit, 1MSPS Analog-to-Digital Converter (ADC)

  Two channel, 12-bit, 1MSPS Dual Output Digital-to-Analog Converter (DAC)

  Two Analog Comparators (AC) with window compare function

  Three Operational Amplifiers (OPAMP)