ATSAMR21E18A-MU

The ATSAMR21E18A-MU is an IEEE 802.15.4 compliant 32-bit Single-chip Microcontroller based on ARM Cortex-M0+ 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
• Single-cycle hardware multiplier
• Micro trace buffer (MTB)
• Power-on reset (POR) and brown-out detection (BOD)
• External interrupt controller (EIC)
• Up to 15 external interrupts
• One non-maskable interrupt
• Two-pin serial wire debug (SWD) programming, test and debugging interface
• Idle and standby sleep modes
• SleepWalking peripherals
• 12-channel Direct memory access controller (DMAC)
• 12-channel Event system
• Integrated ultra low power transceiver for 2.4GHz ISM band
• 32-bit Real-time counter (RTC) with clock/calendar function
• Watchdog timer (WDT)
• CRC-32 generator
• One full-speed (12Mbps) Universal serial bus (USB) 2.0 interface
• Two analog comparators (AC) with window compare function
• Peripheral touch controller (PTC)