Arduino Mega 2560 Product Reference Manual page 2

Features
ATmega2560 Processor
Up to 16 MIPS Throughput at 16MHz
256k bytes (of which 8k is used for the bootloader)
4k bytes EEPROM
8k bytes Internal SRAM
32 × 8 General Purpose Working Registers
Real Time Counter with Separate Oscillator
Four 8-bit PWM Channels
Four Programmable Serial USART
Controller/Peripheral SPI Serial Interface
ATmega16U2
Up to 16 MIPS Throughput at 16 MHz
16k bytes ISP Flash Memory
512 bytes EEPROM
512 bytes SRAM
USART with SPI master only mode and hardware flow control (RTS/CTS)
Master/Slave SPI Serial Interface
Sleep Modes
Idle
ADC Noise Reduction
Power-save
Power-down
Standby
Extended Standby
Power
USB Connection
External AC/DC Adapter
I/O
54 Digital
16 Analog
15 PWM Output
2 / 18 Arduino® MEGA 2560 Rev3
Arduino® MEGA 2560 Rev3
Modified: 15/12/2021