ATSAMD21G18A-AU

Atmel | SMART SAM D21 is a series of low-power microcontrollers using the 32-bit ARM Cortex - M0+ processor, and ranging from 32- to 64-pins with up to 256KB Flash and 32KB of SRAM. The SAM D21 devices operate at a maximum frequency of 48MHz and reach 2.46 CoreMark/MHz. 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 signaling, and support for capacitive touch button, slider and wheel user interfaces. The SAM D21 devices provide the following features: In-system programmable Flash, twelve-channel direct memory access (DMA) controller, 12 channel Event System, programmable interrupt controller, up to 52 programmable I/O pins, 32-bit real-time clock and calendar, up to five 16-bit Timer/Counters (TC) and three 24-bit Timer/Counters for Control (TCC), where each TC can be configured to perform frequency and waveform generation, accurate program execution timing or input capture with time and frequency measurement of digital signals. The TCs can operate in 8- or 16-bit mode, selected TCs can be cascaded to form a 32-bit TC, and three timer/counters have extended functions optimized for motor, lighting and other control applications. The series provide one full-speed USB 2.0 embedded host and device interface; up to six Serial Communication Modules (SERCOM) that each can be configured to act as an USART, UART, SPI, I2C up to 3.4MHz, SMBus, PMBus, and LIN slave; two-channel I2S interface; up to twenty-channel 350ksps 12-bit ADC with programmable gain and optional oversampling and decimation supporting up to 16-bit resolution, one 10-bit 350ksps DAC, two analog comparators with window mode, Peripheral Touch Controller supporting up to 256 buttons, sliders, wheels and proximity sensing.

Key features

• ARM Cortex - M0+ CPU running at up to 48MHz
• Single-cycle hardware multiplier
• Micro Trace Buffer (MTB)
• 32/64/128/256KB in-system self-programmable Flash
• 4/8/16/32KB SRAM Memory
• Power-on reset (POR) and brown-out detection (BOD)
• Internal and external clock options with 48MHz Digital Frequency Locked Loop (DFLL48M) and 48MHz to 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
• Low Power Idle and standby sleep modes
• SleepWalking peripherals
• 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
• Three 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
• 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
• 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 3.4MHz
• SPI
• LIN slave
• 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, 350ksps Digital-to-Analog Converter (DAC)
• Two Analog Comparators (AC) with window compare function
• Peripheral Touch Controller (PTC)
• 256-Channel capacitive touch and proximity sensing
• Up to 52 programmable I/O pins
• Drop in compatible with SAM D20
• Operating Voltage 1.62V – 3.63V