HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 434

• Manufacturer Part Number: HD6433044
• Description: (HD64 Series) Hitachi Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

12.1.2 Block Diagram
Figure 12-1 shows a block diagram of the WDT.
12.1.3 Pin Configuration
Table 12-1 describes the WDT output pin.
Table 12-1 WDT Pin
Name
Reset output
Note: * Open-drain output.
Interrupt signal
Reset
(internal, external)
Legend
TCNT:
TCSR:
RSTCSR:
Timer counter
Timer control/status register
Reset control/status register
Abbreviation
RESO
(interval timer)
Reset control
Figure 12-1 WDT Block Diagram
RSTCSR
Interrupt
control
I/O
Output*
Overflow
Function
External output of the watchdog timer reset signal
422
Clock
selector
TCNT
TCSR
Clock
Internal clock sources
ø/2
ø/32
ø/64
ø/128
ø/256
ø/512
ø/2048
ø/4096
control
Read/
write
Internal
data bus