Power and Specs

Chip Specs (ATMEL ATSAMR21E18A)

  • ARM Cortex M0+ at 48MHz, can be configured to provide an internal
  • 96MHz Fractional Digital Phased Locked Loop clock source.
  • Single-cycle hardware multiplier
  • Micro Trace Buffer (MTB)
  • 256KB in-system self-programmable flash.
  • 32KB SRAM
  • Power-on reset (POR) and brown-out detection (BOD)
  • Idle and standby sleep modes
  • Sleepwalking peripherals


  • Input voltage 10V max (via USB or VIN pin only!). Outputs 3.3V on the 3V3 line.
  • Operating voltage is 1.8V - 3.6V, can be supplied via 3V3 line.
  • Warning: DO NOT REVERSE POLARITY OR CAUSE A SHORT! This will cause irreversible damage to your board.
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