644/1284 Narrow

The smallest ever produced ATmega644/1284-based board

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Narrow is part of the Microchip Get Launched design competition, using LDO Voltage Regulators and ATmega microcontrollers!

644 Narrow and 1284 Narrow are the simplest and perfect upgrade option for all your small footprint Arduino projects. The Narrow board gives you 2 to 8 times more flash and RAM resources as compared to a Uno/Nano, plus total compatibility.

  • A large amount of effective Flash and RAM. Effective because the code generated on 8-bit MCUs is much smaller than on 32-bit MCUs. Hence you can load a bigger program on these 64k/128k MCU than on a 256k 32 bits MCU! ATmega644/1284 also have EEPROM that adds to the total storage capabilities.

  • A small footprint. Narrow boards are approximately 1/5 the of the surface of an Arduino Mega 2560 board, and half its current consumption.

  • Perfect Arduino compatibility. Ten more digital I/Os and one more UART port than an Arduino Nano.

  • Best choice for your 5 volts projects.

Narrow board footprint in relation to other boards.

My frequent use of new generation OLED and TFT displays inspired a need for more resources. Since the Narrow boards are particularly suited to drive such a display, they can feature an optional 0.49" 64x32 OLED on top.

Narrow board mounted with a 0.49” 64 x 32 OLED.

Board Specifications

644 Narrow1284 Narrow
Operating voltage5 V, with on board 5 V and 3.3 V regulators.5 V, with on board 5 V and 3.3 V regulators.
Max currentUSB: 500 mA limited by a PTC. Vin: 800 mA @ 6.2 V, 25°cUSB: 500 mA limited by a PTC. Vin: 800 mA @ 6.2 V, 25°c
Flash64 Kb128 Kb
RAM4 Kb16 Kb
EEPROM2 Kb4 Kb
Digital I/Os2424
Analog I/Os88
PWM68
SPI11
USART22
I²C11
USB11
Size1097 mm²1097 mm²
Weight8 g8 g

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