Contention Between Tcnt Write And Increment - Renesas H8S/2633 Series Hardware Manual

13.6.2

Contention between TCNT Write and Increment

If a timer counter clock pulse is generated during the T2 state of a TCNT write cycle, the write
takes priority and the counter is not incremented.
Figure 13-11 shows this operation.
ø
Address
Internal write signal
TCNT input clock
TCNT
Figure 13-11 Contention between TCNT Write and Increment
TCNT write cycle by CPU
T1 T2
TCNT address
N M
Counter write data
649