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ADM1031 Datasheet(PDF) 25 Page - Analog Devices

Part # ADM1031
Description  Intelligent Temperature Monitor and Dual PWM Fan Controller
PDF  32 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADM1031 Datasheet(HTML) 25 Page - Analog Devices

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ADM1031
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Table XVI. Register 0x02 Status Register 1 Power-On Default = 00H
Bit
Name
R/
W
Description
0
Alarm 1 Speed
Read Only
This bit is set to “1” when fan is running at alarm speed. Once read, this bit
will not reassert on next monitoring cycle, even if the fan is still running at
alarm speed.
1
Fan 1 Fault
Read Only
This bit is set to “1” if Fan 1 becomes stuck or is running under speed.
2
Remote 1 High
Read Only
“1” indicates Remote 1 high temperature limit has been exceeded. If the
temperature is still outside the Remote 1 Temp High Limit, this bit will reas-
sert on next monitoring cycle.
3
Remote 1 Low
Read Only
“1” indicates Remote 1 low temperature limit exceeded (below). If the tem-
perature is still outside the Remote 1 Temp Low Limit, this bit will reassert
on next monitoring cycle.
4
Remote 1 Therm
Read Only
“1” indicates Remote 1 temperature Therm limit has been exceeded. This bit
is cleared on a read of Status Register 1.
5
Remote Diode 1 Error
Read Only
This bit is set to “1” if a short or open is detected on the Remote 1 tempera-
ture channel. This test is only done on power-up, and if set to 1 cannot be
cleared by reading the Status Register 1.
6
Local Temp High
Read Only
“1” indicates Local Temp High Limit has been exceeded. If the temperature
is still outside the Local Temp High Limit, this bit will reassert on next
monitoring cycle.
7
Local Temp Low
Read Only
“1” indicates Local Temp Low Limit has been exceeded (below). If the tem-
perature is still outside the Local Temp Low Limit, this bit will reassert on
next monitoring cycle.
Table XVII. Register 0x03 Status Register 2 Power-Up Default = 00H
Bit
Name
R/
W
Description
0
Alarm 2 Speed
Read Only
This bit is set to “1” when Fan 2 is running at alarm speed. Once read, this
bit will not reassert on next monitoring cycle, even if the fan is still running at
alarm speed.
1
Fan 2 Fault
Read Only
This bit is set to “1” if Fan 2 becomes stuck or is running under speed.
2
Remote 2 High
Read Only
“1” indicates Remote 2 high temperature limit has been exceeded. If the
temperature is still outside the Remote 2 Temp High Limit, this bit will reas-
sert on the next monitoring cycle.
3
Remote 2 Low
Read Only
“1” indicates Remote 2 low temperature limit exceeded (below). If the tem-
perature is still outside the Remote 2 Temp Low Limit, this bit will reassert
on the next monitoring cycle.
4
Remote 2 Therm
Read Only
“1” indicates Remote 2 temperature Therm limit has been exceeded. This bit
is cleared on reading Status Register 2.
5
Remote Diode 2 Error
Read Only
This bit is set to “1” if a short or open is detected on the Remote 2 tempera-
ture channel. This test is only done on power-up, and if set to 1 cannot be
cleared by reading Status Register 2.
6
Local Therm
Read Only
“1” indicates Local temperature Therm limit has been exceeded. This bit
clears on a read of Status Register 2.
7
THERM
Read Only
Set to “1” when THERM is pulled low as an input. This bit clears on a read
of Status Register 2.
Table XVIII. Register 0x06 Extended Temperature Resolution Power-On Default = 00H
Bit
Name
R/
W
Description
<2:0>
Remote Temp 1
Read Only
Holds extended temperature resolution bits for Remote 1 channel.
<5:3>
Remote Temp 2
Read Only
Holds extended temperature resolution bits for Remote 2 channel.
<7:6>
Local Temp
Read Only
Holds extended temperature resolution bits for Local Temperature channel.



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