I have searched all over the Arduino site but I cannot find how to set the PB0 pin so that it outputs the 16MHz System Clock. I have some peripheral HW that I want to be clocked by the Arduino.
You have to change the fuses. Do you have an an ISP programmer or a second Arduino?
I knew that I had to change the fuse bits, particularly CKDIV8. There are two levels of programming the ATMega328P for Arduino (bootloader and application) and I am unclear on which level I need to use.
I have a Freeduino and an Ardweeny and I have an ATMega328P programmed with the Arduino bootloader. I am using a Sparkfun FTDI Basic for the 'weeny.
Thank you for your reply.
You need to change the fuses at the bootloader level.
You can change the settings in boards.txt for your board, then re-burn the bootloader.