1. Devices
  2. SAM L Series
  3. SAM L21
  4. ATSAML21J17A


  • Core

    Cortex-M0+, 48 MHz

  • Family

    SAM L Series

  • Sub-Family

    SAM L21

  • CMSIS Pack


A rich set of peripherals, flexibility and ease-of-use combined with Ultra low power consumption make the Microchip ǀ SMART SAM L21 ARM Cortex-M0+ based microcontroller series ideal for IoT, wireless, and any system that needs large memories and ultra-low power consumption.
The SAM L21 is designed for simple and intuitive migration between SAM L devices with identical peripheral modules, compatible code and a linear address map and is compatible with the SAM D family of general-purpose MCUs.




Maximum Clock Frequency 48 MHz
Memory Protection Unit NO_MPU
Floating Point Unit NO_FPU
Trust Zone
Digital Signal Processor
CortexM Vector Extensions
Endian Little-endian