HD6435348R Hitachi Semiconductor, HD6435348R Datasheet - Page 242

• Manufacturer Part Number: HD6435348R
• Description: Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

11.6 Application Notes
Application programmers should note that the following types of contention can occur in the 8-bit
timer.
Contention between TCNT Write and Clear: If an internal counter clear signal is generated
during the T
write is not performed.
Figure 11-9 shows this type of contention.
3
state of a write cycle to the timer counter, the clear signal takes priority and the
ø
Internal Address
bus
Internal write
signal
Counter clear
signal
TCNT
Figure 11-9 TCNT Write-Clear Contention
Write cycle: CPU writes to TCNT
T
226
1
N
TCNT address
T
2
T
3
H'00