The Atmel ATmega48A/PA/88A/PA/168A/PA/328/P datasheet provides specifications, pin configurations, and feature details for the 8‑bit AVR microcontroller.
The ATmega48A/PA/88A/PA/168A/PA/328/P is a low‑power CMOS 8‑bit microcontroller based on the AVR enhanced RISC architecture. It offers up to 20 MIPS at 20 MHz, multiple sleep modes, and on‑chip peripherals such as timers, ADC, USART, SPI, and I²C.
The datasheet lists memory options (4 KB‑32 KB Flash, 256 B‑1 KB EEPROM, 512 B‑2 KB SRAM), 23 programmable I/O lines, 32 general‑purpose registers, and detailed electrical characteristics, pinouts for various packages, and register summaries for developers.