Hitachi H8/3664 Hardware Manual page 206

Clock Levels Before
and After Modifying
No. Bits CKS1 and CKS0
3 Goes from high level
3
to low level*
4 Goes from high
to high
Notes: 1. Including a transition from the low level to the stopped state, or from the stopped state
to the low level.
2. Including a transition from the stopped state to the high level.
3. Including a transition from the high level to the stopped state.
4. The switchover is seen as a falling edge, and TCNTV is incremented.
190
TCNTV Operation
Clock before
switching
Clock after
switching
Count clock
TCNTV N
Clock before
switching
Clock after
switching
Count clock
TCNTV N
4
*
N+1
Write to CKS1 and CKS0
N+1
Write to CKS1 and CKS0
N+2
N+2