The Microchip ATTINY3224-SSU microcontroller of the tinyAVR® 2 family use the AVR® CPU with hardware multiplier, running at 20 MHz, with 32 KB Flash, 3 KB of SRAM and 256B of EEPROM available in a 14-pin package. The family uses the latest technologies from Microchip with a flexible and low-power architecture including an event system, advanced digital peripherals and accurate analog features such as a 12-bit differential ADC with Programmable Gain Amplifier (PGA).

High-performance low-power AVR® CPU
Single-cycle I/O access
Two-level interrupt controller with vectored interrupts
Two-cycle hardware multiplier
Supply voltage ranges between 1.8V to 5.5V
32B of user row in non volatile memory that can keep data during chip-erase and be programmed while the device is locked
Write/erase endurance
Flash 10, 000 cycles
EEPROM 100, 000 cycles
Data retention: 40 years at 55°C
Power-on Reset (POR)
Brown-out Detection (BOD)
32.768 kHz Ultra-Low Power (ULP) internal oscillator
32.768 kHz external crystal oscillator
Single-pin Unified Program and Debug Interface (UPDI)
Three sleep modes
Idle with all peripherals running and immediate wake-up time
Standby with configurable operation of selected peripherals
Power-Down with full data retention
Host/Client Serial Peripheral Interface (SPI)
Host/Client Two-Wire Interface (TWI) with dual address match
Automated Cyclic Redundancy Check (CRC) flash memory scan
Watchdog Timer (WDT) with Window Mode, with a separate on-chip oscillator
-40°C to 85°C (industrial temperature)
-40°C to 125°C (extended temperature)