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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
|644 Narrow||1284 Narrow|
|Operating voltage||5V, with on board 5V and 3.3V regulators.||5V, with on board 5V and 3.3V regulators.|
|Max current||USB: 500 mA limited by a PTC. Vin: 800 mA @ 6.2V, 25°c||USB: 500 mA limited by a PTC. Vin: 800 mA @ 6.2V, 25°c|
|Flash||64 Kb||128 Kb|
|RAM||4 Kb||16 Kb|
|EEPROM||2 Kb||4 Kb|
|Size||1097 mm²||1097 mm²|
|Weight||8 g||8 g|