I have a project which needs a 16 bit counter which is kept in sync to an external clock signal provided by another IC. I plan to use Atmega644p and it's 16bit Timer/Counter 1, which would be clocked by the external ic via the T1 pin.
However the hard part is, that this external clock signal should be prescaled by 32 to get the right counter speed. I understand from the Atmega644p datasheet, that when driving the Timer/Counter 1 via the T1 pin, you cannot use a prescaler. Did I understand this right?
If this is the case, can anyone recommend for a solution? Is there any cheap external prescaler chips in a very small package? At least my searches did not produce any results...
thanks in advance!