Renesas H8S/2319 series Hardware Manual page 405

Contention between TCNT Write and Increment Operations: If incrementing occurs in the T
state of a TCNT write cycle, the TCNT write takes precedence and TCNT is not incremented.
Figure 9-50 shows the timing in this case.
φ
Address
Write signal
TCNT input
clock
TCNT
Figure 9-50 Contention between TCNT Write and Increment Operations
TCNT write cycle
T T
1 2
TCNT address
N M
TCNT write data
Rev. 5.00, 12/03, page 375 of 1088
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