I working an a project were i need to use almost all the IO pins available in the atmega168.
Ok im using the internal crystal (8mhz), and i want to use the PINs pb6 and Pb7 to read a digital signal, but i can't... I read the data sheet and say that if you are using the internal clock they won't work.. that's true???
But why?, so if you use the external crystal you need to connected it to the pins PB6 and PB7 also, so why they put I/O pins over there???