What is samd21?

The SAMD21 is a series of low-power microcontrollers based on the ARM Cortex-M0+ processor. It is designed and manufactured by Microchip Technology (formerly Atmel) and is widely used in many applications such as IoT, consumer electronics, and industrial automation.

The SAMD21 microcontroller has 32-bit processing capabilities with a maximum clock speed of 48 MHz, and features up to 256 KB of flash memory, up to 32 KB of SRAM, and up to six serial communication modules. It also includes a built-in USB controller, which provides support for USB Full-Speed (12 Mbps) and USB Device/Host/OTG.

The SAMD21 microcontroller is known for its low-power consumption, making it an ideal choice for battery-powered devices. It also includes a variety of other features, such as advanced analog and digital peripherals, security features, and event system capabilities.

Overall, the SAMD21 microcontroller is a versatile, reliable, and energy-efficient platform for a wide range of embedded applications.