Hi everyone,
Thank you for the support so far. Unfortunately, I still haven’t been able to get a response from the microcontroller.
Here’s what I’ve done:
• I confirmed that pin 5 is GND, and pin 4 is VCC — which matches the standard ATmega328P TQFP32 layout.
• Interestingly, pin 25 also seems to be connected to GND on my tester board, whereas on a typical ATmega328P, pin 25 is ADC2 (PC2). This is unusual and might be a clue.
• I decided to desolder the chip from the tester and place it on a breakout board.
• I then tried to flash it externally via USBasp and avrdude.
• Still getting the same error:
program enable: target does not answer (0x01)
I also tried using -B 125 to slow down the SCK clock speed, but still no luck.
At this point, I’m wondering if:
1. The fuse bits were set to use an external clock, and the chip is now unresponsive due to a missing clock signal.
2. The microcontroller is not an ATmega328P at all.
3. Or possibly the chip is permanently damaged.
Any suggestions? Is it possible pin 25 being tied to GND indicates a different chip, or does it still sound like a fuse issue?
Thanks again for any help!
