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Contention between 16TCNT Byte Write and Increment: If an increment pulse occurs in the
T
2
or T
3
state of a 16TCNT byte write cycle, writing takes priority and 16TCNT is not
incremented. The byte data for which a write was not performed is not incremented, and retains its
pre-write value. See figure 8.39, which shows an increment pulse occurring in the T
2
state of a
byte write to 16TCNTH.
φ
Address bus
Internal write signal
16TCNT input clock
16TCNTH
16TCNTL
16TCNTH byte write cycle
T
1
T
2
T
3
N
16TCNTH address
M
16TCNT write data
X
X
X + 1
Figure 8.39 Contention between 16TCNT Byte Write and Increment
Summary of Contents for H8/3008
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