icetube clock circuit
I'm assembling the ice tube clock. I have got to the point where I have placed the 32.768 kHz clock crystal plus capacitors. I have done that, but notice that I no longer get the beep on power up. Looking at the clock pins on the Atmel processor chip (pins 9 and 10), with a scope, I see the correct frequency, but the voltage swing is only 100mV instead of on the order of 5V as required by the chip spec. I have gone through the Ice Tube troubleshooting checklist on this site, and verified that the 5V supply is working etc. I am wondering if somehow the AVR controller is driving the pins as output instead of input. Is there a quick way to verify that the chip is still running the correct program? I am not familiar with AVR programming, but could dive into it if necessary.