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3.16 System Fan Connector (J12)
The 26-pin system fan connector and the pin definition are shown below:
Signal Name
FAN_BMC_TACH8
FAN_BMC_TACH7
FAN_BMC_TACH6
+3.3V
FAN_BMC_TACH4
FAN_BMC_TACH5
FAN_BMC_TACH3
FAN_BMC_TACH2
FAN_BMC_TACH1
Ground
FAN_BMC_TACH12
FAN_BMC_TACH11
FAN_BMC_TACH10
1230B0059901
Figure 3-19 System Fan Connector
Table 3-20 System Fan Connector Pin Definition
Pin
Pin
Signal Name
1
2
+3.3V_STBY
3
4
FAN_CNTR_BUF_PWM1
5
6
FAN_CNTR_BUF_PWM2
7
8
FAN_CNTR_BUF_PWM3
9
10
FAN_CNTR_BUF_PWM4
11
12
FAN_CNTR_BUF_PWM5
13
14
Ground
15
16
FAN_CNTR_BUF_PWM6
2
17
18
I
C_SCL_FAN_CNTR_R
2
19
20
I
C_SDA_FAN_CNTR_R
2
21
22
I
C_ALERT_FAN_N
23
24
FAN_BMC_TACH9
25
26
+5V
Connectors
3-19
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