Hitachi F-ZTAT H8/3039 Series Hardware Manual page 281

Contention between TCNT Word Write and Increment: If an increment pulse occurs in the T
state of a TCNT word write cycle, writing takes priority and TCNT is not incremented. See figure
8-62.
ø
Address
Internal write signal
TCNT input clock
TCNT
Figure 8-62 Contention between TCNT Word Write and Increment
TCNT word write cycle
T T
1 2
TCNT address
N
TCNT write data
T
3
M
3
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