Product Overview ATtiny202/402 is a member of the tinyAVR 0 series microcontrollers, using an AVR processor with a hardware multiplier, running at frequencies up to 20 MHz, with 2/4 KB Flash, 128/256 bytes SRAM and 64/128 bytes EEPROM, in an 8-pin package. The tinyAVR 0 series uses the latest technology, featuring a flexible low-power architecture, including an event system and SleepWalking, precise analog features, and core-independent peripherals. CPU: AVR CPU – running at frequencies up to 20 MHz Single-cycle I/O access Two-level interrupt controller Two-cycle hardware multiplier Memory: 2/4 KB in-system programmable Flash memory 64/128B EEPROM 128/256B SRAM Write/Erase Endurance: Flash: 10,000 cycles EEPROM: 100,000 cycles Data retention: 40 years at 55°C System: Power-on Reset (POR) Brown-out Detector (BOD) Clock options: 16/20 MHz low-power internal RC oscillator 32.768 kHz ultra-low-power (ULP) internal RC oscillator External clock input Single-pin Unified Program and Debug Interface (UPDI) Three sleep modes: Idle mode, all peripherals running for instant wake-up Standby mode – configurable operation of selected peripherals – SleepWalking peripherals Power-down mode, with full data retention A low propagation delay analog comparator (AC) A 10-bit 115 ksps analog-to-digital converter (ADC) Multiple voltage references (VREF): 0.55V 1.1V 1.5V 2.5V 4.3V Event System (EVSYS), for CPU-independent and predictable inter-peripheral signal routing Configurable Custom Logic (CCL), with two programmable look-up tables Automatic CRC memory scan (CRCSCAN) External interrupts on all general-purpose pins I/O and Package: Six programmable I/O lines 8-pin SOIC150 Temperature range: -40°C to 105°C -40°C to 125°C Speed grades: 0-5 MHz @ 1.8V – 5.5V 0.10 MHz @ 2.7V-5.5V 0-20 MHz @ 4.5V – 5.5V