HD64F3028F25 Datasheet, PDF (209/925 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

Table 6.10 Internal Clock Switchover and RTCNT Operation
CKS2 to CKS0
No. Write Timing
RTCNT Operation
1
Low → Low
switchover^*1
Old clock source
New clock source
RTCNT clock
RTCNT
2
Low → High
switchover^*2
Old clock source
N
N+1
CKS bits rewritten
New clock source
RTCNT clock
RTCNT
N
3
High → Low
switchover^*3
Old clock source
N+1
N+2
CKS bits rewritten
New clock source
RTCNT clock
RTCNT
N
*4
N+1
N+2
CKS bits rewritten
Rev. 2.00, 09/03, page 177 of 890