W83637HF Datasheet, PDF (35/149 Pages) Winbond – LPC I/O

W83637HF
Divisor
1
2 (default)
4
8
16
32
64
128
Nominal
PRM
8800
4400
2200
1100
550
275
137
68
Time per
Revolution
6.82 ms
13.64 ms
27.27 ms
54.54 ms
109.08 ms
218.16 ms
436.32 ms
872.64 ms
Counts
153
153
153
153
153
153
153
153
Table 2
70% RPM Time for 70%
6160
3080
1540
770
385
192
96
48
9.84 ms
19.48 ms
38.96 ms
77.92 ms
155.84 ms
311.68 ms
623.36 ms
1246.72 ms
+12V
+12V
FAN Out
GND
FAN
Connector
diode
+5V
Pull-up resister
4.7K Ohms
Fan Input
Pin 111-112
W83637HF
+12V
+12V
FAN Out
GND
FAN
Connector
diode
Pull-up resister
4.7K Ohms
14K~39K
Fan Input
Pin 111-112
10K
W83637HF
Fan with Tach Pull-Up to +5V
Fan with Tach Pull-Up to +12V, or Totem-Pole
Output and Register Attenuator
+12V
+12V
+12V
FAN Out
GND
FAN
Connector
diode
Pull-up resister
> 1K
Fan Input ^{Pin 111-112}
3.9V Zener
W83637HF
+12V
FAN Out
GND
FAN
Connector
diode
Pull-up resister < 1K
or totem-pole output
> 1K
Fan Input
Pin 111-112
3.9V Zener
W83637HF
Fan with Tach Pull-Up to +12V and Zener Clamp
Fan with Tach Pull-Up to +12V, or Totem-Pole
Output and Zener Clamp
Figure 6.4
- 30 -
Publication Release Date: June 25, 2003
Revision 1.3