The ATmega328 datasheet is the definitive technical manual for the 8-bit AVR microcontroller that serves as the "brain" for the Arduino Uno . Spanning hundreds of pages, it provides every detail needed to design circuits, write low-level code, and optimize power consumption. Key Technical Specifications : High-performance, low-power 8-bit AVR RISC. Memory : 32 KB In-System Self-Programmable Flash. 1 KB EEPROM (non-volatile data). 2 KB Internal SRAM (volatile data).

: 23 general-purpose I/O lines including 6 PWM channels and a 6-channel 10-bit ADC. Essential Sections for Developers 1. Pin Configurations

The Datasheet defines the physical mapping of pins (PDIP, TQFP, and QFN/MLF packages). It is crucial for identifying VCC, GND, and the specific functions of Port B, C, and D. 2. Interrupts and Timers ATmega328P - Microchip Technology

: Up to 20 MIPS (Million Instructions Per Second) at 20 MHz. Voltage : Operating range of