Timer/Counter Prescalers
Figure 30. Prescaler for Timer/Counter0 and 1
Clear
PSR10
ATmega161(L)
TCK1
TCK0
For Timer/Counters 0 and 1, the four prescaled selections are: CK/8, CK/64, CK/256 and CK/1024, where CK is the oscilla-
tor clock. For the two Timer/Counters 0 and 1, CK, external source, and stop, can also be selected as clock sources.
Setting the PSR10 bit in SFIOR resets the prescaler. This allows the user to operate with a predictable prescaler. Note that
Timer/Counter1 and Timer/Counter 0 share the same prescaler and a prescaler reset will affect both Timer/Counters.
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