參數(shù)資料
型號： ADM1026
廠商： Analog Devices, Inc.
英文描述： Complete Thermal and System Management Controller
中文描述： 完整的熱和系統(tǒng)管理控制器
文件頁數(shù)： 39/56頁
文件大小： 634K
代理商： ADM1026
ADM1026
Rev. A | Page 39 of 56
Table 14. Register 01h, Configuration Register 2 (Power-On Default 00h)
Bit Name
R/W
0
Enable GPIO0/Fan0 = 0 R/W
Description
When this bit is 1, Pin 3 is enabled as a general-purpose I/O pin (GPIO0), otherwise it is a fan tach
measurement input (Fan 0).
When this bit is 1, Pin 4 is enabled as a general-purpose I/O pin (GPIO1), otherwise it is a fan tach
measurement input (Fan 1).
When this bit is 1, Pin 5 is enabled as a general-purpose I/O pin (GPIO2), otherwise it is a fan tach
measurement input (Fan 2).
When this bit is 1, Pin 6 is enabled as a general-purpose I/O pin (GPIO3), otherwise it is a fan tach
measurement input (Fan 3).
When this bit is 1, Pin 9 is enabled as a general-purpose I/O pin (GPIO4), otherwise it is a fan tach
measurement input (Fan 4).
When this bit is 1, Pin 10 is enabled as a general-purpose I/O pin (GPIO5), otherwise it is a fan tach
measurement input (Fan 5).
When this bit is 1, Pin 11 is enabled as a general-purpose I/O pin (GPIO6), otherwise it is a fan tach
measurement input (Fan 6).
When this bit is 1, Pin 12 is enabled as a general-purpose I/O pin (GPIO7), otherwise it is a fan tach
measurement input (Fan 7).
1
Enable GPIO1/Fan1 = 0 R/W
2
Enable GPIO2/Fan2 = 0 R/W
3
Enable GPIO3/Fan3 = 0 R/W
4
Enable GPIO4/Fan4 = 0 R/W
5
Enable GPIO5/Fan5 = 0 R/W
6
Enable GPIO6/Fan6 = 0 R/W
7
Enable GPIO7/Fan7 = 0 R/W
Table 15. Register 02h, Fans 0 to 3 Fan Divisor Register (Power-On Default 55h)
Bit
Name
R/W
Description
1–0
Fan 0 Divisor
R/W
Sets the oscillator prescaler division ratio for Fan 0 speed measurement. The division ratios, oscillator
frequencies, and typical fan speeds (based on 2 tach pulses per revolution) are as follows:
Code
Divide By
00
1
01
2
10
4
11
8
3–2
Fan 1 Divisor
R/W
Same as Fan 0
5–4
Fan 2 Divisor
R/W
Same as Fan 0
7–6
Fan 3 Divisor
R/W
Same as Fan 0
Oscillator
Frequency (kHz)
22.5
11.25
5.62
2.81
Fan Speed (RPM)
8800, nominal, for count of 153
4400, nominal, for count of 153
2200, nominal, for count of 153
1100, nominal, for count of 153
Table 16. Register 03h, Fans 4 to 7 Fan Divisor Register (Power-On Default 55h)
Bit
Name
R/W
Description
1–0
Fan 4 Divisor
R/W
Sets the oscillator prescaler division ratio for Fan 4 speed measurement. The division ratios, oscillator
frequencies, and typical fan speeds (based on 2 tach pulses per revolution) are as follows:
Code
Divide By
00
1
01
2
10
4
11
8
3-2
Fan 5 Divisor
R/W
Same as Fan 4
5-4
Fan 6 Divisor
R/W
Same as Fan 4
7-6
Fan 7 Divisor
R/W
Same as Fan 4
Oscillator
Frequency (kHz)
22.5
11.25
5.62
2.81
Fan Speed (RPM)
8800, nominal, for count of 153
4400, nominal, for count of 153
2200, nominal, for count of 153
1100, nominal, for count of 153
Table 17. Register 04h, DAC Control Register (Power-On Default FFh)
Bit
Name
R/W
Description
7–0
DAC Control
R/W
This register contains the value to which the fan speed DAC is programmed in normal mode, or the
4 MSBs contain the minimum fan speed in auto fan speed control mode.
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