Hitachi H8/3062 Hardware Manual page 337

CKS1 and CKS0 Write
No. Timing
Low → low switchover*
4
Notes: 1. Including switchovers from the high level to the halted state, and from the halted state
to the high level.
2. Including switchover from the halted state to the low level.
3. Including switchover from the low level to the halted state.
4. The switchover is regarded as a rising edge, causing 8TCNT to increment.
318
8TCNT Operation
4
Old clock
source
New clock
source
8TCNT clock
8TCNT N N+1 N+2
CKS bits rewritten