The ATSAMD21J18A-AF is a SMART SAMD21 series 32-bit Low-power Microcontroller based on the high-performance ARM Cortex-M0+ RISC processor. It operates at a maximum speed of 48MHz and features 256kB of flash memory and 32kB of SRAM. Peripherals include six serial communication modules (SERCOM) configurable as UART/USART, five 16-bit timers/counters, 32-bit Real-Time Clock and calendar, 24 PWM channels, one 20-channel 12-bit ADC, one 10-bit DAC, Full Speed USB Device and embedded Host and support for up to 256 touch channels. The device operates from 1.62 to 3.63V.
- ARM Cortex-M0+ CPU running at up to 48MHz
- Single-cycle hardware multiplier
- Micro trace buffer (MTB)
- Power-on reset (POR) and brown-out detection (BOD)
- 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
- 12-channel Direct memory access controller (DMAC)
- 12-channel Event system
- 32-bit Real-time counter (RTC) with clock/calendar function
- Watchdog timer (WDT)
- CRC-32 generator
- One full-speed (12Mbps) Universal serial bus (USB) 2.0 interface
- Peripheral touch controller (PTC)
- Easy pin migration to SAMD21G and SAMD21J devices
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