HD6435348R Hitachi Semiconductor, HD6435348R Datasheet - Page 257

• Manufacturer Part Number: HD6435348R
• Description: Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

13.1.2 Block Diagram
Figure 13-1 is a block diagram of the watchdog timer.
13.1.3 Register Configuration
Table 13-1 lists information on the watchdog timer registers.
Table 13-1 Register Configuration
Name
Timer control/status register
Timer counter
Reset control/status register
* Software can write a 0 to clear the status flag bits, but cannot write 1.
Reset
(internal, external)
TCNT
TCSR
RSTCSR
Interval timer mode
: Timer Counter
: Timer Control/Status Register
: Reset Control/Status Register
Interrupt signal
Reset control
RSTCSR
Figure 13-1 Block Diagram of Timer Counter
Interrupt
control
Abbreviation
TCSR
TCNT
RSTCSR
Overflow
242
Clock
R/W
R/W
R/(W)*
R/(W)*
TCSR
TCNT
select
Clock
Initial
Value
H'18
H'00
H'3F
Internal clock sources
Write
H'FEEC
H'FEEC
H'FF14
ø/2
ø/32
ø/64
ø/128
ø/256
ø/512
ø/2048
ø/4096
Addresses
control
Read/
write
Read
H'FEEC
H'FEED
H'FF15
Internal data bus