No.
Description
Timing
3
High → low*3
Old clock
source
New clock
source
*4
TCNT clock
pulse
N
N + 1
N + 2
TCNT
CKS rewrite
4
High → high
Old clock
source
New clock
source
TCNT clock
pulse
TCNT
N
N + 1
N + 2
CKS rewrite
Notes: *1 Including a transition from low to the stopped state (CKS1 = 0, CKS0 = 0), or a
transition from the stopped state to low.
*2 Including a transition from the stopped state to high.
*3 Including a transition from high to the stopped state.
*4 The switching of clock sources is regarded as a falling edge that increments TCNT.
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