HD6433308 Datasheet, PDF (184/349 Pages) Hitachi Semiconductor – Hitachi Single-Chip MicroComputer

Table 7-5. 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
*^*3²
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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