Microchip Technology SAM L21 Microcontrollers

Microchip Technology SAM L21 are ultralow-power microcontrollers (MCU) using the 32-bit ARM® Cortex®-M0+ processor. The processor runs at max. 48MHz (2.46 CoreMark®/MHz) and up to 256KB Flash and 40KB of SRAM. The MCUs are housed in 32-, 48-, and 64-pin package. The SAM L21 feature sophisticated power management technologies, like power domain gating, SleepWalking, ultralow-power peripherals and more that allow for very low current consumption. The highly configurable peripherals include a touch controller supporting capacitive interfaces with proximity sensing.

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.

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
- Static and Dynamic Power Gating Architecture
- Battery backup support
- Two Performance Levels
- Embedded Buck/LDO regulator supporting on-the-fly selection
Peripherals
- 16-channel Direct Memory Access Controller (DMAC)
- 12-channel Event System
- Up to five 16-bit Timer/Counters (TC) including one low-power TC, each configurable as:
- 16-bit TC with two compare/capture channels
- 8-bit TC with two compare/capture channels
- 32-bit TC with two compare/capture channels, by using two TCs