SAMD21 in SAM Microcontrollers Family
The SAMD21 series, developed by Microchip Technology (formerly Atmel), is a family of low-power microcontrollers based on the 32-bit ARM Cortex-M0+ processor. These MCUs are designed to provide an optimal balance between power consumption and performance, filling the gap between 8-bit and 32-bit applications. They are widely recognized for their integration in the Arduino Zero and various industrial platforms, offering a robust set of peripherals including the Serial Communication Interface (SERCOM) and an integrated USB controller.
Variants in This Sub-Family
SAMD21 variants are primarily distinguished by their flash memory capacity, ranging from 32KB to 256KB, and SRAM density from 4KB to 32KB. Physical packaging also defines the sub-family, with options spanning from 32-pin QFNs for space-constrained designs to 64-pin TQFP packages for high I/O requirements. Some specific variants include additional features like high-temperature qualification for automotive or industrial thermal environments.
