HD6473032F16 Datasheet, PDF (211/847 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

CKS2 to CKS0
No. Write Timing
RTCNT Operation
3 High → low switchover^*3
Old clock
source
New clock
source
RTCNT
clock
Section 7 Refresh Controller
*4
RTCNT
N
4 High → high switchover
Old clock
source
New clock
source
RTCNT
clock
N+1
N+2
CKS bits rewritten
RTCNT
N
N+1
N+2
CKS bits rewritten
Notes: 1. Including switchovers from a low clock source to the halted state, and from the halted
state to a low clock source.
2. Including switchover from the halted state to a high clock source.
3. Including switchover from a high clock source to the halted state.
4. The switchover is regarded as a falling edge, causing RTCNT to increment.
Rev. 3.00 Mar 21, 2006 page 181 of 814
REJ09B0302-0300