HD643303x Hitachi, HD643303x Datasheet - Page 311

• Manufacturer Part Number: HD643303x
• Description: Hitachi Microcomputer
• Manufacturer: Hitachi

10.1.2 Block Diagram
Figure 10-1 shows a block diagram of the WDT.
10.1.3 Pin Configuration
Table 10-1 describes the WDT output pin.
Table 10-1 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 10-1 WDT Block Diagram
RSTCSR
Interrupt
control
I/O
Output*
Overflow
Function
External output of the watchdog timer reset signal
296
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