644/1284 Narrow

The smallest ever produced Atmega644/1284-based board

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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 bits MCU is much smaller than on 32 bits 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 a Mega2560 board, and half its current consumption.

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

  • 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 1284 board mounted with a 0.49” 64x32 OLED

Board Specifications

644 Narrow1284 Narrow
Operating voltage5V, with on board 5V and 3.3V regulators.5V, with on board 5V and 3.3V regulators.
Max currentUSB: 500 mA limited by a PTC. Vin: 800 mA @ 6.2V, 25°cUSB: 500 mA limited by a PTC. Vin: 800 mA @ 6.2V, 25°c
Flash64 Kb128 Kb
RAM4 Kb16 Kb
Digital I/Os2424
Analog I/Os88
Size1097 mm²1097 mm²
Weight8 g8 g

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

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