Atmel SAMD20E17

The Atmel SAMD20E17 is a Core - ARM Cortex-M0+ CPU running up to 48MHz Memories - 16K/32K/64K/128K/256KB In-System Self-Programmable Flash - 2K/4K/8K/16K/32KB SRAM System - Power-on reset and brown-out detection - Internal and external clock options with Digital Frequency Locked Loop (DFLL) - External Interrupt Controller (EIC) - 16 external interrupts - 1 non-maskable interrupt - Two-pin SWD programming, test and debugging interface Low Power - Idle and Standby sleep modes - SleepWalking peripherals Peripherals - 8-channel Event System - 5/7/7 16-bit Timer/Counters each configurable as, or period register and one compare/capture channel One 8-bit timer/counter with period register and 2 compare/capture channels Two 16-bit timer/counters combined as one 32-bit timer/counter with two compare/capture channels - 32-bit Real Time Counter with clock/calendar function - Watchdog Timer - CRC-16 and CRC-32 generator - 4/5/6 Serial Communication Modules (SERCOM) each configurable to operate as USART, I2C, SPI - One 7/12/16-channel 12-bit 300ksps Analog-to-Digital Converter - Differential and single ended channels - 1/2x to 16x gain stage - Automatic offset and gain error compensation - Oversampling and decimation in hardware to support 13, 14, 15 or 16-bit resolution - 10-bit 300 ksps Digital-to-Analog Converter - 2 Analog Comparators with Window Compare Function - Peripheral Touch Controller I/O - 26/40/54 Programmable I/O Lines.