ATSAMR21G18A-MU

The ATSAMR21G18A-MU is a 32-bit SMART ARM-based Wireless Microcontroller with 256kB flash and 32kB SRAM memory. IEEE 802.15.4 compliant single chip combines an ARM® Cortex®-M0+ based 32-bit microcontroller and best-in-class 2.4GHz RF transceiver. It offers an excellent RF performance, with a link budget of 103dBm while consuming 50% less active current than existing offerings. The device features IEEE 802.15.4 MAC hardware accelerators and automatic transmission modes, wake-on-radio, offers twelve-channel direct memory access (DMA) controller, up to four configurable SERCOM modules for I²C, SPI and USART and a 128-bit AES crypto engine. The device features further blocks like a Peripheral Touch Controller (PTC), Full-Speed USB Device and embedded Host and hardware components to support RF distance measurements. To complement that set the SAM R21 also supports external power amplifiers and antenna diversity.

• ARM Cortex-M0+ CPU running at up to 48MHz
• Internal and external clock options
• Digital phase locked loop (FDPLL96M)
• External Interrupt Controller (EIC)
• Up to 15 external interrupts
• One non-maskable interrupt
• Two-pin serial wire debug (SWD) programming, test and debugging interface
• Low power - Idle and standby sleep modes
• Peripherals - 12-channel Direct Memory Access Controller (DMAC)