The ATSAMD21E18A-AU is a low-power high-performance SMART ARM® Cortex®-M0+ based Flash Microcontroller with 256kB of flash and 32kB of SRAM memory. Four serial communication modules (SERCOM) configurable as UART/USART, SPI or I²C, three 16-bit timer/counters, 32-bit Real-time clock and calendar, 18 PWM channels, one 14-channel 12-bit ADC, one 10-bit DAC. 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, Atmel Event System for inter-peripheral signalling and support for capacitive touch button, slider and wheel user interfaces.
Full speed USB device and embedded host
Support for up to 60 touch channels
Easy pin migration to SAMD21G and SAMD21J devices
Supported by Atmel studio, the Atmel software framework and the SAM D21 Xplained Pro Kit
Power-on reset (POR) and brown-out detection (BOD)
Internal and external clock options
Digital phase locked loop (FDPLL96M)
External Interrupt Controller (EIC)
16 External interrupts
One non-maskable interrupt
Two-pin serial wire debug (SWD) programming, test and debugging interface
Peripherals - 32-bit Real Time Counter (RTC) with clock/calendar function
One full-speed (12Mbps) Universal Serial Bus (USB) 2.0 interface
