ATMEGA1284P-PU 8-Bit High-Performance AVR Microcontroller DIP-40 (ATMEGA1284P-PU IC)

The ATMEGA1284P-PU is a high-performance, low-power 8-bit AVR RISC-based microcontroller that represents one of the most powerful options in the 40-pin DIP family. Housed in a 40-pin PDIP package, it is specifically designed for complex embedded applications that require significantly more memory than the standard ATmega328P. It features a massive 128KB of Flash memory, 16KB of SRAM, and 4KB of EEPROM, making it ideal for large firmware projects, data logging, and RTOS-based systems.

In India, this IC is a favorite for high-end robotics, industrial gateways, and DIY projects like the Sanguino, which brings Arduino-like simplicity to a much more capable hardware platform. Its picoPower technology ensures minimal power consumption, while its dual USARTs and 8-channel 10-bit ADC provide extensive connectivity and sensing capabilities without the need for external surface-mount components.

Key Features

• Large Memory Capacity: 128KB ISP Flash memory with read-while-write capabilities, allowing for extensive code and data storage.
• High SRAM: 16KB of internal SRAM—the largest in its class—to handle complex calculations and large buffers.
• Advanced RISC Architecture: 131 powerful instructions, most executing in a single clock cycle for throughputs up to 20 MIPS.
• picoPower Technology: Optimized for ultra-low power consumption, reaching as low as 0.1µA in power-down mode.
• Rich Peripherals: Includes two programmable serial USARTs, an 8-channel 10-bit ADC, and six PWM channels.
• JTAG Interface: IEEE 1149.1 compliant for easy on-chip debugging and boundary-scan.
• Wide Voltage Range: Operates reliably from 1.8V to 5.5V.

Specifications

• IC Type: 8-Bit Microcontroller (MCU)
• Core: AVR
• Flash Memory: 128 KB
• SRAM / EEPROM: 16 KB / 4 KB
• Maximum Speed: 20 MHz
• I/O Pins: 32 Programmable I/O Lines
• A/D Converter: 8-channel, 10-bit resolution
• Package Type: PDIP-40 (0.600", 15.24mm width)
• Mounting Type: Through-Hole
• Operating Temperature: -40 to +85 degrees Celsius

Pinout Configuration (40-Pin DIP)

• Pins 1-8 (PB0-PB7): Port B I/O (Includes SPI, Timers, and PWM).
• Pin 9 (RESET): Reset Input (Active Low).
• Pin 10 (VCC): Digital Supply Voltage.
• Pin 11 (GND): Ground.
• Pin 12 (XTAL2): Crystal Oscillator Output.
• Pin 13 (XTAL1): Crystal Oscillator Input.
• Pins 14-21 (PD0-PD7): Port D I/O (Includes USART0, USART1, and Interrupts).
• Pins 22-29 (PC0-PC7): Port C I/O (Includes JTAG and I2C/TWI).
• Pin 30 (AVCC): Supply Voltage for Port A and ADC.
• Pin 31 (GND): Ground.
• Pin 32 (AREF): Analog Reference Pin for ADC.
• Pins 33-40 (PA0-PA7): Port A I/O (Analog Inputs for ADC).