ATSAMD21E18A-AF

Features 

• Processor – Arm® Cortex® -M0+ CPU running at up to 48 MHz 

• Single-cycle hardware multiplier 

• Micro Trace Buffer (MTB) 

• Memories – 4/2/1/0.5 KB Read-While-Write (RWWEE) Flash section (not available on 256 KB devices) – 256/128/64/32/16 KB in-system self-programmable Flash – 32/16/8/4 KB SRAM Memory 

• System – Power-on Reset (POR) and Brown-out Detection (BOD) – Internal and external clock options with 48 MHz Digital Frequency-Locked Loop (DFLL48M) and 48 MHz to 96 MHz Fractional Digital Phase-Locked Loop (FDPLL96M) – External Interrupt Controller (EIC) – 16 external interrupts – One Non-maskable Interrupt (NMI) – 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 – Up to five 16-bit Timer/Counters (TC), configurable as either: 

• One 16-bit TC with two compare/capture channels 

• One 8-bit TC with two compare/capture channels 

• One 32-bit TC with two compare/capture channels, by using two TCs – Up to four 24-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 – PWM Channels using TC and TCC peripherals: 

• Up to eight PWM channels on each 24-bit TCC 

• Up to two PWM channels on each 16-bit TCC 

• Up to two PWM channels on each 16-bit TC – 32-bit Real Time Counter (RTC) with clock/calendar function – Watchdog Timer (WDT) – CRC-32 generator