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F71869AD 参数 Datasheet PDF下载

F71869AD图片预览
型号: F71869AD
PDF下载: 下载PDF文件 查看货源
内容描述: 超级I / O +硬件监控 [Super I/O + Hardware Monitor]
分类和应用: 监控
文件页数/大小: 156 页 / 1561 K
品牌: FINTEK [ FEATURE INTEGRATION TECHNOLOGY INC. ]
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F71869A  
5.2.11. Fan Speed Control Mechanism  
There are some modes to control fan speed and they are 1.Manual mode, 2.Stage auto  
mode 3. Linear auto mode. More detail, please refer the description of registers.  
Each fan can be controlled by up to 8 kinds of temperature inputs: (1) D1+ temperature (2)  
D2+ temperature (3) D3+ temperature (4) PECI temperature (5) 4 suits SMBus master  
temperature. Each fan would make the maximum temperature comparison form those  
inputs with the expected speed, and decide the suitable fan speed. Please refer below  
figure 7.  
PECI  
(T0)  
D1+ T  
(T1)  
Expected  
Fan1  
Fan2  
speed1  
D2+ T  
(T2)  
Expected  
speed 2  
D3+ T  
(T3)  
IBX  
Byte1  
Expeted  
speed 3  
Fan3  
IBX  
Byte3:2  
IBX  
Byte4  
IBX  
Byte5  
Figure 7 Relative temperature fan control  
Manual mode  
For manual mode, it generally acts as software fan speed control.  
Auto mode  
In auto mode, the F71869A provides automatic fan speed control related to temperature  
variation of CPU/GPU or the system. The F71869A can provide four temperature boundaries and five  
intervals, and each interval has its related fan speed count. All these values should be set by BIOS  
first. Take FAN1 for example, the 4 temperature boundaries could be set from register 0xA6 to 0xA9  
and the five intervals for fan speed control could be set from register 0xAA to 0xAE. And the  
28  
Oct., 2011  
V0.19P  
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