ATSAMD21G18A-AU ARM Microcontroller MCU 256KB 32KB TQFP-48 GRN 1.6-3.6V 48MHz

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

– One full-speed (12 Mbps) Universal Serial Bus (USB) 2.0 interface
• Embedded host and device function
• Eight endpoints
– Up to six Serial Communication Interfaces (SERCOM), each configurable to operate as either:
• USART with full-duplex and single-wire half-duplex configuration
• I2C up to 3.4 MHz
• SPI
• LIN client
– One two-channel Inter-IC Sound (I2S) interface
– One 12-bit, 350ksps Analog-to-Digital Converter (ADC) with up to 20 channels
• 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, 350 ksps Digital-to-Analog Converter (DAC)
– Up to four Analog Comparators (AC) with Window Compare function
– Peripheral Touch Controller (PTC)
• Up to 256-Channel capacitive touch and proximity sensing
• I/O
– Up to 52 programmable I/O pins
• Qualification
– SAM D21 AEC-Q100 Grade 1 (-40°C to 125°C)
– SAM DA1 AEC-Q100 Grade 2 (-40C to 105C)
• Drop-in compatible with SAM D20
• Packages
– 64-pin TQFP, QFN, UFBGA
– 48-pin TQFP, QFN
– 45-pin WLCSP
– 35-pin WLCSP
– 32-pin TQFP, QFN
• Operating Voltage
– SAM D21: 1.62V – 3.63V
– SAM DA1: 2.7V - 3.63V

Block Diagram

1. Some products have different number of SERCOM instances, Timer/Counter instances, PTC signals and ADC
signals. Refer to the Configuration Summary for details.
2. The TCC instances have different configurations, including the number of Waveform Output (WO) lines. Refer
to the TCC Configuration for details.

Specifications

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