485
Contention between TCNT Write and Clear Operations: If the counter clear signal is
generated in the T2 state of a TCNT write cycle, TCNT clearing takes precedence and the TCNT
write is not performed.
Figure 11-49 shows the timing in this case.
Counter clear
signal
Write signal
Address
ø
TCNT address
TCNT
TCNT write cycle
T1
T2
N
H'0000
Figure 11-49 Contention between TCNT Write and Clear Operations