Having searched the datasheets for AVRs which support clock out, I cannot seem to find an equivalent circuit diagram or similar to answer my question.
I want to output my system clock to provide a clock souce for another device, to save on another crystal and caps - however, I'm just wondering if I need to buffer the clock signal prior to feeding it into another device - which would entirely defeat the point of trying to save on board space.
Logic would say no buffer needed, as the relevant section in the datasheet that says the system clock can be output is called 'Clock Output Buffer', so I'm assuming this is a buffer internal to the AVR.
It is somewhat frustrating that a fuse needs to be set to use it, I know... It would be nicer if there were a specific register access routine like that for using the watchdog that would enable you to use it.
It's none of the chips that come on Arduino boards I'm using, but AVR none the less. Thanks!