The ATtiny45A/44A/43A is a low-cost, high-performance AVR microcontroller from Atmel. It features 130 instructions, single-cycle execution, 32 general purpose registers, static operation, 16 MIPS throughput, an on-chip 2-cycle multiplier, 8K bytes of In-System Self-Programmable Flash, 512 bytes of EEPROM, 512 bytes of internal SRAM, two 8-bit timers/counters, one 16-bit timer/counter, a real-time counter, four PWM channels, eight 10-bit ADCs, two serial interfaces, one SPI interface, one USART interface, one watchdog timer, and one analog comparator. It also has power-on reset and programmable brown-out detection, an internal calibrated RC oscillator, external and internal interrupt sources, and six sleep modes.
The ATmega8535 family is a low‑power 8‑bit AVR microcontroller offering up to 8 KB of In‑System Programmable Flash, 512 B EEPROM and 512 B SRAM. It includes a rich peripheral set such as two 8‑bit timers, one 16‑bit timer, a byte‑oriented two‑wire serial interface, USART, SPI, an 8‑channel 10‑bit ADC, PWM channels, and multiple sleep modes.
The document provides full pin‑out diagrams, electrical characteristics, timing tables, boot‑loader support, programming information, and an errata list. It also contains a complete register summary, instruction set overview, and packaging details for the PDIP, TQFP, PLCC and QFN/MLF packages.
| Flash Memory | 8 KB |
|---|---|
| EEPROM | 512 B |
| SRAM | 512 B |
| Operating Voltage (ATmega8535L) | 2.7 V – 5.5 V |
| Maximum Clock Frequency (ATmega8535L) | 8 MHz |
| General‑purpose I/O Lines | 32 |
| ADC Channels | 8 single‑ended, 7 differential (TQFP only) |
| PWM Channels | Four |
The device provides 8 KB of In‑System Self‑Programmable Flash memory.
ATmega8535 operates from 4.5 V to 5.5 V, while ATmega8535L operates from 2.7 V to 5.5 V.
It has 32 programmable I/O lines.