The ATSAMR21E17A-MU is an IEEE 802.15.4 compliant 32-bit Single-chip Microcontroller based on ARM Cortex-M0+ processor 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
(EN)
