SMART ARM-based
Microcontrollers
SAM L21 Family Data Sheet
Introduction
В® В® В® Atmel | SMART SAM L21 is a series of Ultra low-power microcontrollers using the 32-bit ARM Cortex В®
M0+ processor at max. 48MHz (2.46 CoreMark /MHz) and up to 256KB Flash and 40KB of SRAM in a
32, 48, and 64 pin package. The sophisticated power management technologies, such as power domain
gating, SleepWalking, Ultra low-power peripherals and more, allow for very low current consumptions.
The highly configurable peripherals include a touch controller supporting capacitive interfaces with
proximity sensing. Features Processor
– ARM Cortex-M0+ CPU running at up to 48MHz Single-cycle hardware multiplier Micro Trace Buffer Memories
– 32/64/128/256KB in-system self-programmable Flash
– 1/2/4/8KB Flash Read-While-Write section
– 4/8/16/32KB SRAM Main Memory
– 2/4/8/8KB SRAM Low power Memory System
– Power-on reset (POR) and brown-out detection (BOD)
– Internal and external clock options
– External Interrupt Controller (EIC)
– 16 external interrupts
– One non-maskable interrupt
– Two-pin Serial Wire Debug (SWD) programming, test and debugging interface Low Power
– Idle, Standby, Backup, and Off sleep modes
– SleepWalking peripherals …