Table 7-9 Internal Clock Switchover and RTCNT Operation (cont)
CKS2 to CKS0
No.
Write Timing
RTCNT Operation
3
High
→
low switchover
*
1
4
High
→
high switchover
Notes: 1. Including switchover from a high clock source to the halted state.
2. The switchover is regarded as a falling edge, causing RTCNT to increment.
Old clock
source
New clock
source
RTCNT
clock
RTCNT
N
N + 1
CKS bits rewritten
N + 2
2
*
Old clock
source
New clock
source
RTCNT
clock
RTCNT
N
N + 1
CKS bits rewritten
N + 2
182
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