HD6475328-CP10 HITACHI [Hitachi Semiconductor], HD6475328-CP10 Datasheet - Page 237

• Manufacturer Part Number: HD6475328-CP10
• Description: original Hitachi CMOS microcomputer unit (MCU)
• Manufacturer: HITACHI [Hitachi Semiconductor]

Contention between TCNT Write and Increment: If a timer counter increment pulse is
generated during the T
timer counter is not incremented.
Figure 11-10 shows this type of contention.
ø
Internal Address
bus
Internal write
signal
TCNT clock
pulse
TCNT
Figure 11-10 TCNT Write-Increment Contention
3
state of a write cycle to the timer counter, the write takes priority and the
Write cycle: CPU writes to TCNT
T
1
N
TCNT address
221
T
2
T
3
Write data
M