HD6433640 HITACHI [Hitachi Semiconductor], HD6433640 Datasheet - Page 244

• Manufacturer Part Number: HD6433640
• Description: H8/3644 Series Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

9.4.7
The following types of contention can occur in timer V operation.
Contention between TCNTV Write and Counter Clear: If a TCNTV clear signal is generated
in the T
not carried out. Figure 9.13 shows the timing.
236
3
state of a TCNTV write cycle, clearing takes precedence and the write to the counter is
Application Notes
ø
Address
Internal write
signal
Counter clear
signal
TCNTV
Figure 9.13 Contention between TCNTV Write and Clear
TCNTV write cycle by CPU
T
1
TCNTV address
N
T
2
T
3
H'00