HD6473258CP10 Datasheet, PDF (175/301 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

Table 8-5. Effect of Changing Internal Clock Sources (cont.)
No. Description
High → Low*¹:
CKS1 and CKS0 are
3
rewritten while old
clock source is high and
new clock source is low.
Old clock
source
New clock
source
TCNT clock
pulse
Timing chart
*^*23
TCNT
N
High → High:
CKS1 and CKS0 are
4
rewritten while both
clock sources are high.
Old clock
source
New clock
source
TCNT clock
pulse
N+1
N+2
CKS rewrite
TCNT
N
N+1
N+2
CKS rewrite
*¹ Including a transition from high to the stopped state.
*² The switching of clock sources is regarded as a falling edge that increments the TCNT.
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