3069RF-ZTAT Datasheet, PDF (204/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

Table 6.10 Internal Clock Switchover and RTCNT Operation
No.
CKS2 to CKS0
Write Timing
1
Low Low
switchover*¹
RTCNT Operation
Old clock source
2
Low High
switchover*²
New clock source
RTCNT clock
RTCNT
Old clock source
N
N+1
CKS bits rewritten
New clock source
RTCNT clock
RTCNT
N
N+1
N+2
CKS bits rewritten
Rev. 5.0, 09/04, page 182 of 978