问题
I am trying to connect to Atmega328P chip through eXtreme Burner. I used 22pf capacitors and 10K pull for reset. I am able to read the chip if I use 8 MHz Crystal. But cannot read if I connect 16MHz crystal. When I looked at the datasheet, it says fuse bits are same for 8 MHz and 16 MHz. I get "Power On Failed" error message with 16 MHz. I am using USBASP programmer. Please note: With 8 MHz crystal, though I am able to read the device, I get error message "Incorrect Chip Found! Continue". If I press OK, it reads the data. The fuse bits read using 8 MHz crystal are: Low-- FF, High - DE, Extended -- FD, Lock Fuse - CF and Calibration - FFFFFFB1 What could be the issue? Attached screen shots in the link http://www.filedropper.com/extremeburnererrors
回答1:
Its not in your settings then, so it must be in the setup of your hardware. Try different capacitor values. If I remember correctly, you have to vary the value of the capacitors as the frequency of your crystal varies. Also you have to take in to account the added inductance and capacitance of the breadboard or pcb and solder. So I would suggest just trial and error with different capacitor values.
来源：https://stackoverflow.com/questions/31716875/unable-to-connect-to-atmega328p-chip-with-16mhz-crystal