ATSAMR21G18A 32-bit Microcontroller Xplained Pro Evaluation Kit

The Microchip 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 Flash, 32KB of SRAM and are operating at a maximum frequency of 48MHz and reach 2.46 Coremark/MHz. They are designed for simple and intuitive migration with identical peripheral modules, hex compatible code, identical linear address map and pin compatible migration paths between all devices in the product series. All devices include intelligent and flexible peripherals, Microchip Event System for inter-peripheral signaling, and support for capacitive touch button, slider and wheel user interfaces. The Microchip SAM R21 devices provide the following features: In-system programmable Flash, optional 512KB serial Flash,12-channel direct memory access (DMA) controller, 12-channel Event System, programmable interrupt controller, up to 28 programmable I/O pins, ultra-low power 2.4GHz ISM band transceiver with a data rate of 250kb/s, 32-bit real-time clock and calendar, three 16-bit Timer/Counters (TC) and three 16-bit Timer/Counters for Control (TCC), where each TC can be configured to perform frequency and waveform generation, accurate program execution timing or input capture with time and frequency measurement of digital signals. The TCs can operate in 8- or 16-bit mode, selected TCs can be cascaded to form a 32-bit TC, and the three Timer/Counters for Control have extended functions optimized for motor, lighting and other control applications.

• Processor
• ARM Cortex-M0+ CPU running at up to 48MHz
• Single-cycle hardware multiplier
• Micro Trace Buffer (MTB)
• Memories
• 768(1)/256/128/64KB in-system self-programmable Flash
• 32/16/8KB SRAM
• System
• Power-on reset (POR) and brown-out detection (BOD)
• Internal and external clock options with 48MHz Digital Frequency Locked Loop (DFLL48M) and 48MHz to 96MHz Fractional 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
• SleepWalking peripherals
• Peripherals
• 12-channel Direct Memory Access Controller (DMAC)
• 12-channel Event System
• Integrated Ultra Low Power Transceiver for 2.4GHz ISM Band
• Supported PSDU Data rates: 250kb/s, 500kb/s, 1000kb/s and 2000kb/s(2)
• -99dBm RX Sensitivity; TX Output Power up to +4dBm
• Hardware Assisted MAC (Auto-Acknowledge, Auto-Retry)
• SFD-Detection; Spreading; De-Spreading; Framing; CRC-16 Computation
• Antenna Diversity and TX/RX Control
• 128 Byte TX/RX Frame Buffer
• Integrated 16MHz Crystal Oscillator (external crystal needed)
• PLL synthesizer with 5 MHz and 500 kHz channel spacing for 2.4GHz ISM band
• Hardware Security (AES, True Random Generator)
• Three 16-bit Timer/Counters (TC), configurable as either:
• One 16-bit TC with compare/capture channels
• One 8-bit TC with compare/capture channels
• One 32-bit TC with compare/capture channels, by using two TCs
• Three 16-bit Timer/Counters for Control (TCC), with extended functions:
• Up to four compare channels with optional complementary output
• Generation of synchronized pulse width modulation (PWM) pattern across port pins
• Deterministic fault protection, fast decay and configurable dead-time between complementary output
• Dithering that increase resolution with up to 5 bit and reduce quantization error
• 32-bit Real Time Counter (RTC) with clock/calendar function.