Usage Notes; Contention Between Tcnt Write And Clear; Figure 11.10 Contention Between Tcnt Write And Clear - Hitachi H8S/2215 Series Hardware Manual

11.8

Usage Notes

11.8.1

Contention between TCNT Write and Clear

If a timer counter clock pulse is generated during the T
takes priority, so that the counter is cleared and the write is not performed. Figure 11.10 shows this
operation.
ø
Address
Internal write signal
Counter clear signal
TCNT

Figure 11.10 Contention between TCNT Write and Clear

state of a TCNT write cycle, the clear
2
TCNT write cycle by CPU
T1 T2
TCNT address
N H'00
Rev. 3.0, 10/02, page 341 of 686