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ADM1031
Table 16. REGISTERS
Address
Register Name
Value Registers
Device ID Register
Company ID THERM
Behavior/Revision
Configuration Register 1
Configuration Register 2
Status Register 1
Status Register 2
Manufacturer’s Test Register
Fan Characteristics Register 1
Fan Characteristics Register 2
Fan Speed Configuration Register
Fan Filter Register
Local Temperature T MIN /T RANGE
Remote 1 Temperature T MIN /T RANGE
Remote 2 Temperature T MIN /T RANGE
Table 17. VALUE REGISTERS
A7 ? A0 in Hex
0x08–0x1E
0x3D
0x3E
0x3F
0x00
0x01
0x02
0x03
0x07
0x20
0x21
0x22
0x23
0x24
0x25
0x26
Comments
See Table 17.
This location contains the device identification number. Since this device
is the ADM1031, this register contains 0x31. This register is read only.
This location contains the company identification number (0x41). This
register is read only.
This location contains the revision number of the device. The lower four bits
reflect device revisions [3:0]. Bit 7 of this register is the THERM-to-fan
enable bit. See Table 30.
See Table 18. (Power-On Value = 1001 0000)
See Table 19. (Power-On Value = 0111 1111)
See Table 20. (Power-On Value = 0000 0000)
See Table 21. (Power-On Value = 0000 0000)
This register is used by the manufacturer for test purposes only. This
register should not be read from or written to in normal operation.
See Table 23. (Power-On Value = 0101 1101)
See Table 24 . (Power-On Value = 0101 1101)
See Table 25. (Power-On Value = 0101 0101)
See Table 26. (Power-On Value = 0101 0000)
See Table 27. (Power-On Value = 0100 0001)
See Table 28. (Power-On Value = 0110 0001)
See Table 29. (Power-On Value = 0110 0001)
Address
0x06
0x08
0x09
0x0A
0x0B
0x0C
0x0D
0x0E
0x0F
0x10
0x11
0x14
0x15
0x16
0x18
0x19
0x1A
0x1C
0x1D
0x1E
R/W
R
R/W
R/W
R
R
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
Extended Temperature Resolution (see Table 22).
Fan 1 Speed. This register contains the value of the Fan 1 tach measurement.
Fan 2 Speed. This register contains the value of the Fan 2 tach measurement.
Local Temperature Value. This register contains the 8 MSBs of the local temperature measurement.
Remote 1 Temperature Value. This register contains the 8 MSBs of the Remote 1 temperature reading.
Remote 2 Temperature Value. This register contains the 8 MSBs of the Remote 2 temperature reading.
Local Temperature Offset. See Table 31. (Power-On Default = 00h)
Remote 1 Temperature Offset. See Table 32. (Power-On Default = 00h)
Remote 2 Temperature Offset. See Table 33. (Power-On Default = 00h)
Fan 1 Tach High Limit. This register contains the limit for the Fan 1 tach measurement. Because the tach
circuit counts between pulses, a slow fan results in a large measure value, so exceeding the limit is the
way to detect a slow or stalled fan. (Power-On Default = FFh)
Fan 2 Tach High Limit. This register contains the limit for the Fan 2 tach measurement. Because the tach
circuit counts between pulses, a slow fan results in a large measured value, so exceeding the limit is the
way to detect a slow or stalled fan. (Power-On Default = FFh)
Local Temperature High Limit (Power-On Default 60 ? C)
Local Temperature Low Limit (Power-On Default 0 ? C)
Local Temperature THERM Limit (Power-On Default 70 ? C)
Remote 1 Temperature High Limit (Power-On Default 80 ? C)
Remote 1 Temperature Low Limit (Power-On Default 0 ? C)
Remote 1 Temperature THERM Limit (Power-On Default 100 ? C)
Remote 2 Temperature High Limit (Power-On Default 80 ? C)
Remote 2 Temperature Low Limit (Power-On Default 0 ? C)
Remote 2 Temperature THERM Limit (Power-On Default 100 ? C)
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