upd78f0730 Renesas Electronics Corporation., upd78f0730 Datasheet - Page 222

• Manufacturer Part Number: upd78f0730
• Description: 8-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

9.4.3 Setting window open period of watchdog timer
(default) to bits 6 and 5 (WINDOW1, WINDOW0) of the option byte.
watchdog timer is cleared and starts counting again.
222
In the
Whenever WDTE is written to during the window open period (100%), as long as it is before the overflow time, the
The window open period to be set is as follows.
Counting
starts
µ
PD78F0730, the window open period of the watchdog timer is 100%. Do not set any values other than 1, 1
Caution Only the combination of WINDOW1 and WINDOW0 = 1, 1 is valid. Other settings are
WINDOW1
0
0
1
1
prohibited.
Table 9-4. Setting Window Open Period of Watchdog Timer
WINDOW0
Window open period (100%)
0
1
0
1
Counting starts again when
“ACH” is written to WDTE.
Setting prohibited
Setting prohibited
Setting prohibited
100% (default)
Preliminary User’s Manual U19014EJ1V0UD
CHAPTER 9 WATCHDOG TIMER
Window Open Period of Watchdog Timer
Overflow
time