HD6473032F Datasheet, PDF (311/572 Pages) Hitachi Semiconductor – Hitachi Microcomputer

10.1.2 Block Diagram
Figure 10-1 shows a block diagram of the WDT.
Overflow
Interrupt signal
Interrupt
(interval timer) ^control
TCNT
TCSR
RSTCSR
Reset
(internal, external)
Reset control
Legend
TCNT: Timer counter
TCSR: Timer control/status register
RSTCSR: Reset control/status register
Clock
Clock
selector
Read/
write
control
Internal
data bus
Internal clock sources
ø/2
ø/32
ø/64
ø/128
ø/256
ø/512
ø/2048
ø/4096
Figure 10-1 WDT Block Diagram
10.1.3 Pin Configuration
Table 10-1 describes the WDT output pin.
Table 10-1 WDT Pin
Name
Abbreviation
Reset output RESO
Note: * Open-drain output.
I/O
Output*
Function
External output of the watchdog timer reset signal
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