user34459: can i run Atmega1284P at 3.3V and 8Mhz speed.? can i burn Nick Gammon Arduino bootloaders into the chip.?
Thank You

user18600: Atmega1284P 8MHz @ 3.3V?
Yes, you can. Documentation states this is permitted voltage for that frequency:  0 - 10MHz @ 2.7V - 5.5V http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-42719-ATmega1284P_Datasheet.pdf
Nick Gammon Arduino bootloaders?
On this page http://www.gammon.com.au/bootloader it states Atmega1284.
In code https://github.com/nickgammon/arduino_sketches/blob/master/Atmega_Self_Read_Signature/Atmega_Self_Read_Signature.ino
there is signature for Atmega1284P so it should work without issues.

34459: <p>can i run Atmega1284P at 3.3V and 8Mhz speed.? can i burn Nick Gammon Arduino bootloaders into the chip.?</p>

<p>Thank You</p>
 18600: <p>Atmega1284P 8MHz @ 3.3V?</p>

<p>Yes, you can. Documentation states this is permitted voltage for that frequency:  0 - 10MHz @ 2.7V - 5.5V <a href="http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-42719-ATmega1284P_Datasheet.pdf" rel="nofollow noreferrer">http://ww1.microchip.com/downloads/en/DeviceDoc/Atmel-42719-ATmega1284P_Datasheet.pdf</a></p>

<p>Nick Gammon Arduino bootloaders?</p>

<p>On this page <a href="http://www.gammon.com.au/bootloader" rel="nofollow noreferrer">http://www.gammon.com.au/bootloader</a> it states Atmega1284.
In code <a href="https://github.com/nickgammon/arduino_sketches/blob/master/Atmega_Self_Read_Signature/Atmega_Self_Read_Signature.ino" rel="nofollow noreferrer">https://github.com/nickgammon/arduino_sketches/blob/master/Atmega_Self_Read_Signature/Atmega_Self_Read_Signature.ino</a>
there is signature for Atmega1284P so it should work without issues.</p>
