UPD78F0838 Renesas Electronics Corporation., UPD78F0838 Datasheet - Page 345

• Manufacturer Part Number: UPD78F0838
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

Remark If the overflow time is set to 2
<When window open period is 25%>
Window close time
Window open time
Overflow time:
2
Window close time:
0 to 2
Window open time:
2
264 kHz (MAX.) = 3.2 to 4.27 ms
10
10
/f
/f
OSC
OSC
10
/f
(MAX.) = 2
OSC
(MIN.)
(MIN.)
Preliminary User’s Manual U19748EJ1V0UD
CHAPTER 9 WATCHDOG TIMER
10
(1
/264 kHz (MAX.) = 4.27 ms
0 to 3.2 ms
3.2 to 4.27 ms
(1
0.25) = 0 to 2
25%
0.25) to 2
10
/f
OSC
, the window close time and open time are as follows.
10
0 to 2.13 ms
2.13 to 4.27 ms
/f
10
OSC
Setting of Window Open Period
/216 kHz (MIN.)
50%
(MAX.) = 2
0 to 1.07 ms
1.07 to 4.27 ms
10
0.75 = 0 to 3.2 ms
/216 kHz (MIN.)
75%
(when 2.7 V
None
0 to 4.27 ms
V
100%
DD
0.75 to 2
5.5 V)
343
10
/