HD6475328-CP10 HITACHI [Hitachi Semiconductor], HD6475328-CP10 Datasheet - Page 240

• Manufacturer Part Number: HD6475328-CP10
• Description: original Hitachi CMOS microcomputer unit (MCU)
• Manufacturer: HITACHI [Hitachi Semiconductor]

Table 11-5 Effect of Changing Internal Clock Sources (cont)
No.
2
3
Note: *1 Including a transition from the stopped state to High.
Description
Low
CKS1 and CKS0 are
rewritten while old
clock source is Low and
new clock source is High.
High
CKS1 and CKS0 are
rewritten while old
clock source is High and
new clock source is Low.
*2 Including a transition from High to the stopped state.
*3 The switching of clock sources is regarded as a falling edge that increments the TCNT.
High
Low
*1
*2
:
:
Timing Chart
Old clock
source
New clock
source
TCNT clock
pulse
TCNT
Old clock
source
New clock
source
TCNT clock
pulse
TCNT
224
N
N
N + 1
CKS rewrite
N + 1
*3
CKS rewrite
N + 2
N + 2