HD6417021 Hitachi Semiconductor, HD6417021 Datasheet - Page 349

• Manufacturer Part Number: HD6417021
• Description: SuperH RISC engine
• Manufacturer: Hitachi Semiconductor

WT/IT: Timer mode select bit
TME:
Note:
reset signal*
WDTOVF
Internal
signal
Timer enable bit
The internal reset signal is only generated when the RSTE bit is 1.
H'FF
H'00
TCNT
value
WT/IT = 1
TME = 1
Figure 12.4 Operation in the Watchdog Timer Mode
H'00 written
in TCNT
internal reset generated
WDTOVF and
WOVF = 1
Overflow
128 clock
512 clock
WT/IT = 1
TME = 1
H'00 written
in TCNT
HITACHI 335
Time