SAMR21E microcontroller equivalent, wireless microcontroller.
In-system programmable Flash, optional 512KB serial Flash,12-channel direct memory access (DMA) controller, 12-channel Event System, programmable interrupt controller, u.
The series provide one full-speed USB 2.0 embedded host and device interface; up to five Serial Communication Modules (.
The Atmel® | SMART™ SAM R21 is a series of low-power microcontrollers using the 32-bit ARM® Cortex®-M0+ processor and an integrated ultra-low power 2.4GHz ISM band transceiver. SAM R21 devices are available in 32- and 48-pin packages with up to 256KB.
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