AVR16DU28-I/SS

These microcontrollers integrate analog functions, Core Independent Peripherals, and communication peripherals with ultra-low-power technology, making them suitable for a wide range of general-purpose and low-power applications. These 28-pin devices feature a 10-bit ADC with computation capability that automates capacitive voltage divider techniques for advanced touch sensing, averaging, filtering, oversampling, and automatic threshold comparison. They also offer a suite of Core Independent Peripherals such as Complementary Waveform Generator, Windowed Watchdog Timer, CRC/Memory Scan, Zero-Cross Detection, and Peripheral Pin Select, enhancing design flexibility and reducing system cost.

Key features

• C compiler-optimized RISC architecture
• Operating speed: DC to 64 MHz clock input, minimum instruction cycle 62.5 ns
• Programmable 2-level interrupt priority
• 31-level deep hardware stack
• Three 8-bit timers with hardware limit timers
• Four 16-bit timers
• Low-current power-on reset
• Power-on timer
• Brown-out reset
• Low-power brown-out reset option
• Windowed Watchdog Timer: generates reset on too-long or too-short watchdog clear event intervals, with selectable prescaler and window size, all sources configurable via hardware or software
• Up to 32 KB program Flash
• Up to 2048 bytes data SRAM
• 256 bytes data EEPROM
• Programmable code protection
• Direct, indirect, and relative addressing modes
• Operating voltage range: 1.8V to 3.6V (low-voltage versions), 2.3V to 5.5V (standard voltage versions)
• Temperature range: Industrial -40°C to 85°C, Extended -40°C to 125°C
• Power-saving operating modes: Doze, Idle, Sleep
• Peripheral Module Disable: selectively disable hardware modules to minimize dynamic power consumption of unused peripherals
• Ultra-low-power mode: typical Sleep current 500 nA @ 1.8V, Sleep current with Watchdog Timer 900 nA @ 1.8V
• Ultra-low-power features: typical Sleep mode current 50 nA @ 1.8V, typical Windowed Watchdog Timer current 500 nA @ 1.8V, typical 32 kHz secondary oscillator current 500 nA, typical operating current 8 μA @ 32 kHz/1.8V, typical operating current 32 μA/MHz @ 1.8V
• Complementary Waveform Generator: rising- and falling-edge dead-band control, full-bridge, half-bridge, and single-output drive, multiple signal sources
• Two Capture/Compare/PWM modules: 16-bit resolution in Capture/Compare mode, 10-bit resolution in PWM mode
• Two 10-bit PWM modules
• Serial communications: one Enhanced USART with auto-baud detection, Start bit auto-wake, RS-232, RS-485, LIN compatible; SPI; I²C, SMBus, PMBus compatible
• Up to 25 I/O pins and one input-only pin: individually programmable pull-ups, slew rate control, interrupt-on-change for all pins, input level selection control
• Programmable CRC with memory scan: reliable data/program memory monitoring for functional safety (e.g., Class B), checksum calculation over any portion of Flash or EEPROM, high-speed or background operation
• Timer with hardware limit timer: hardware monitoring and fault detection
• Peripheral Pin Select: pin remapping for digital I/O
• Data Signal Modulator
• 10-bit ADC with computation: 24 external channels, conversion during Sleep, 4 internal analog channels, internal and external trigger options, automated math functions on input signals (averaging, filter calculation, oversampling, and threshold comparison), 8-bit hardware acquisition timer
• Hardware capacitive voltage divider support: 8-bit precharge timer, adjustable sample-and-hold capacitor array, guard ring digital output driver
• Zero-Cross Detection: detects zero-crossing instants of AC signals on input pins
• 5-bit DAC: externally available output, programmable 5-bit voltage, internal connection to comparators and ADC
• Two comparators: four external inputs, external output via Peripheral Pin Select
• Fixed Voltage Reference module: 1.024V, 2.048V, and 4.096V output levels, two buffered outputs: one for DAC/comparator, one for ADC
• Clock structure: high-accuracy internal oscillator module, selectable frequency up to 64 MHz, ±1% accuracy when calibrated; 32 kHz low-power internal oscillator; external 32 kHz crystal oscillator; external high-frequency oscillator module: three crystal/resonator modes, digital clock input mode, 4× PLL with external source; Fail-Safe Clock Monitor: enables safe shutdown when external clock fails; oscillator start-up timer
• Programming/debugging: In-Circuit Serial Programming via two pins, In-Circuit Debugging via two pins with three breakpoints, on-chip integrated debug capability