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Author Topic: How to burn the bootloader and sketches on Atmega328p-Au  (Read 265 times)
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Hi guys, i am building a custom arduino compatible board, and i'm using the atmega328p-Au chip.
I am powering the board with a 3.7 lipo battery, and i was wondering if i could still use the 16 mhz external oscillator even if the chip will be powered with 3.3v (i'll use a voltage regulator).
Second question:
How am i suppose to burn the bootloader and upload sketches into the chip? I should make ICSP or FTDI headers? Which one will be able to burn bootloader and upload sketches? Thanks!
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I believe the maximum speed at 3.3V is 8 Mhz.
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Arduino UNOs, Pro-Minis, ATMega328, ATtiny85, LCDs, MCP4162, keypads,
DS18B20s,74c922,nRF24L01, RS232, SD card, RC fixed wing, quadcopter

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As stated above the device is rated for 8 MHz at 3.3v but you will probably find that it will work at 16 MHz.  I wouldn't recommend doing that for a commercial design but I know that the Moteino devices that I bought are working fine under those conditions.

You will need the ICSP connections to burn the bootloader.  You can use either the ICSP or the FTDI connections to upload sketches.


Don
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Ok, now it's more clear, thank you.
But can i still use the Arduino IDE to upload sketches though the ICSP?
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