• ARM Cortex-M0+ CPU running at up to 48MHz
• Single-cycle hardware multiplier
• 256KB in-system self-programmable Flash
• 32KB SRAM memory
• Power-on reset (POR) and brown-out detection (BOD)
• Internal and external clock options with 48MHdigital frequency locked loop (DFLL48M) and 48MHto 96MHz
• fractional 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
• Idle and standby sleep modes
• SleepWalking peripherals
• 8-channel event system
• 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
• 32-bit real time counter (RTC) with clock/calendar function
• Watchdog timer (WDT)
• CRC-32 generator
• USART with full-duplex and single-wire half-duplex configuration
• I2C up to 40kHz
• SPI
• Differential and single-ended input
• 1/2x to 16x programmable gain stage
• Automatic offset and gain error compensation
• Oversampling and decimation in hardware to support 13-, 14-, 15- or 16-bit resolution
• 10-bit, 350ksps digital-to-analog converter (DAC)
• Two analog comparators (AC) with window compare function
• 256-channel capacitive touch and proximity sensing
• 52 GPIO pins
• 64-pin TQFP, QFN
• 64-ball UFBGA
• 1.62V to 3.63V
• Down to 70µA/MHz in active mode
• Down to 8µA running the peripheral Touch Controller
• –40 to +105°C

A low-power, high-performance Microchip's ARM® Cortex®-M0+ based flash microcontroller, the ATSAMD20J18 is ideal for a wide range of home automation, consumer, metering, and industrial applications. It features:

• 256KB of flash and 32KB of SRAM
• Up to 48MHz operating frequency
• Six serial communication modules (SERCOM) configurable as UART/USART, SPI or I²C, eight 16-bit timer/counters, 32-bit Real Time clock and calendar, 16 PWM channels, one 20-channel 12-bit ADC, one 10-bit DAC
• Support for up to 256 touch channels
• 1.62V to 3.63V power supply
• Easy pin migration to SAMD20E and SAMD20G devices
• Supported by Atmel Studio, ASF and the SAM D20 Xplained Pro kit

Supported by MPLAB X IDE and MPLAB Harmony.