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Fan Driver BD – D side
CN9817 From SLAVE uC BD (J9)
Note: Pin to Pin
12V
12V
GND
5V
GND
I2C_SCL
I2C_SDA
FAN_Driver BD_Flag
–
–
CN9815 for Fan8
FG1
Vout
GND
CN9816 for Fan6
FG1
Vout
GND
–
CN9818 for Fan16
FG1
Vout
GND
–
–
CN9819 for Fan2
FG1
Vout
GND
–
–
–
"Confidential, Do Not Duplicate without written authorization from NEC."
TROUBLESHOOTING
1
f
12V Input
2
3
–
GND
4
f
5V Input
5
–
GND
6
f
I2C communication between uC BD and Fan Driver BD
7
n
If FAN actual RPM is out of the programmed value, ALERT pin
8
g
goes low.
9
–
–
10
–
–
1
f
FAN Speed indication. (Pluse)(5V)
2
g
Fan voltage out
3
–
GND
1
f
FAN Speed indication. (Pluse)(5V)
2
g
Fan voltage out
3
–
GND
4
–
–
1
f
FAN Speed indication. (Pluse)(5V)
2
g
Fan voltage out
3
–
GND
4
–
–
5
–
–
f
1
FAN Speed indication. (Pluse)(5V)
g
2
Fan voltage out
3
–
GND
4
–
–
5
–
–
6
–
–
4-26
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Table of Contents
Troubleshooting
