hd66100 Renesas Electronics Corporation., hd66100 Datasheet - Page 254

• Manufacturer Part Number: hd66100
• Description: H8/3867 Series
• Manufacturer: Renesas Electronics Corporation.

9.6.4
Table 9.18 summarizes the watchdog timer operation states.
Table 9.18 Watchdog Timer Operation States
Operation Mode
TCW
TCSRW
Note: * Functions when øw/32 is selected as the input clock.
Internal reset
signal
TCW count
value
H'FF
H'00
Watchdog Timer Operation States
Figure 9.17 Typical Watchdog Timer Operations (Example)
H'F8
H'F8 written
in TCW
Reset Active
Reset
Reset
Functions Functions Halted
Functions Functions Retained
Start
Sleep
H'F8 written in TCW
Watch
Sub-
active
Functions/
Halted*
Functions/
Halted*
512 ø
Sub-
sleep
Halted
Retained Retained Retained
Reset
OSC
TCW overflow
clock cycles
Standby
Halted
Module
Standby
Halted
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