W83697HF/F
Divisor
Nominal
PRM
Time per
Revolution
Counts
70% RPM
Time for 70%
1
8800
4400
2200
1100
550
275
137
68
6.82 ms
13.64 ms
27.27 ms
54.54 ms
109.08 ms
218.16 ms
436.32 ms
872.64 ms
153
153
153
153
153
153
153
153
6160
3080
1540
770
385
192
96
9.74 ms
19.48 ms
38.96 ms
77.92 ms
155.84 ms
311.68 ms
623.36 ms
1246.72 ms
2 (default)
4
8
16
32
64
128
48
Table 1.
+12V
+5V
+12V
Pull-up resister
4.7K Ohms
Pull-up resister
4.7K Ohms
diode
diode
+12V
FAN Out
GND
+12V
FAN Out
GND
14K~39K
Fan Input
Fan Input
10K
W83697HF
W83697HF
FAN
Connector
FAN
Connector
Fan with Tach Pull-Up to +5V
Fan with Tach Pull-Up to +12V, or Totem-Pole
Output and Register Attenuator
+12V
+12V
Pull-up resister < 1K
diode
diode
Pull-up resister
> 1K
or totem-pole output
+12V
FAN Out
GND
+12V
Fan Input
FAN Out
GND
Fan Input
3.9V Zener
> 1K
3.9V Zener
W83697HF
W83697HF
FAN
Connector
FAN
Connector
Fan with Tach Pull-Up to +12V, or Totem-Pole
Output and Zener Clamp
Fan with Tach Pull-Up to +12V and Zener Clamp
Figure 9.4
Publication Release Date: Feb. 2002
Revision 0.70
- 89 -
WINBOND [ WINBOND ]
