Block Diagram; Pin Configuration; Figure 11.1 Wdt Block Diagram; Table 11.1 Wdt Pin - Hitachi H8/3062 Hardware Manual

11.1.2

Block Diagram

Figure 11.1 shows a block diagram of the WDT.
Interrupt signal
(interval timer)
Reset
(internal, external)
Legend:
TCNT : Timer counter
TCSR : Timer control/status register
RSTCSR : Reset control/status register
11.1.3

Pin Configuration

Table 11.1 describes the WDT output pin * .
Note: * Not present in the versions with on-chip flash memory.

Table 11.1 WDT Pin

Name Abbreviation
RESO
Reset output
Note: * Open-drain output
350
Overflow
Interrupt
control
RSTCSR
Reset control
Clock

Figure 11.1 WDT Block Diagram

I/O Function
Output *
External output of the watchdog timer reset signal
TCNT
TCSR
Internal clock sources
φ/2
φ/32
φ/64
φ/128
Clock
φ/256
selector
φ/512
φ/2048
φ/4096
Internal
data bus
Read/
write
control