Hitachi H8/3062 Hardware Manual page 370

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.
322
8TCNT Operation
4
Old clock
source
New clock
source
8TCNT clock
8TCNT N N+1 N+2
CKS bits rewritten