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Contention between 16TCNT Write and Overflow or Underflow: If an overflow occurs in the
T
3
state of a 16TCNT write cycle, writing takes priority and the counter is not incremented. OVF
is
set to 1.The same holds for underflow. See figure 8.41.
φ
Address bus
Internal write signal
16TCNT input clock
Overflow signal
16TCNT
OVF
H'FFFF
16TCNT address
M
16TCNT write data
16TCNT write cycle
T
1
T
2
T
3
Figure 8.41 Contention between 16TCNT Write and Overflow
Summary of Contents for H8/3008
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