ADM1031ARQ-REEL7 ON Semiconductor, ADM1031ARQ-REEL7 Datasheet - Page 25

• Manufacturer Part Number: ADM1031ARQ-REEL7
• Description: IC SENSOR 2-TEMP/FAN CTRL 16QSOP
• Manufacturer: ON Semiconductor

Specifications of ADM1031ARQ-REEL7

• Rohs Status: RoHS non-compliant
• Function: Fan Control, Temp Monitor
• Topology: ADC, Comparator, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: 0°C ~ 100°C, External Sensor
• Output Type: SMBus™
• Output Alarm: Yes
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: 0°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP

Table 15. Register 0y01 Configuration 2 Power−On Default = 7FH
Table 16. Register 0y02 Status Register 1 Power−On Default = 00H
Table 17. Register 0y03 Status Register 2 Powerup Default = 00H
Bit
Bit
Bit
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
Remote Diode 1 Error
Remote Diode 2 Error
Remote 1 Temp En
Remote 2 Temp En
Remote 1 THERM
Remote 2 THERM
Local Temp High
Local Temp Low
Remote 1 High
Remote 2 High
Alarm 1 Speed
Alarm 2 Speed
Remote 1 Low
Remote 2 Low
Local THERM
Loc Temp En
TACH 1 En
TACH 2 En
Fan 1 Fault
Fan 2 Fault
PWM 1 En
PWM 2 En
SW Reset
THERM
Name
Name
Name
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
Enables Fan 1 PWM output when this bit is a “1.”
Enables Fan 2 PWM output when this bit is a “1.”
Enables Tach 1 input when set to “1.”
Enables Tach 2 input when set to “1.”
Enables Interrupts on local temperature channel when set to “1.”
Interrupts on Remote 1 Channel when set to “1.” Default is normally enabled, except
when a diode fault is detected on powerup.
Enables Interrupts on Remote 2 Channel when set to “1.” Default is normally enabled,
except when a diode fault is detected on powerup.
When set to “1,” resets the device. Self−clears. Powerup Default = 0.
This bit is set to “1” when fan is running at alarm speed. Once read, this bit is not
reasserted on next monitoring cycle, even if the fan is still running at alarm speed.
This bit is set to “1” if Fan 1 becomes stuck or is running under speed.
“1” indicates Remote 1 high temperature limit has been exceeded. If the temperature
is still outside the Remote 1 Temp High Limit, this bit reasserts on next monitoring
cycle.
“1” indicates Remote 1 low temperature limit exceeded (below). If the temperature is
still outside the Remote 1 Temp Low Limit, this bit reasserts on next monitoring cycle.
“1” indicates Remote 1 temperature THERM limit has been exceeded. This bit is
cleared on a read of Status Register 1.
This bit is set to “1” if a short or open is detected on the Remote 1 temperature
channel. This test is only done on powerup, and if set to 1 cannot be cleared by
reading the Status Register 1.
This bit is set to “1” if a short or open is detected on the Remote 1 temperature
channel. This test is only done on powerup, and if set to 1 cannot be cleared by
reading the Status Register 1.
“1” indicates Local Temp Low Limit has been exceeded (below). If the temperature is
still outside the Local Temp Low Limit, this bit reasserts on next monitoring cycle.
This bit is set to “1” when Fan 2 is running at alarm speed. Once read, this bit is not
reasserted on next monitoring cycle, even if the fan is still running at alarm speed.
This bit is set to “1” if Fan 2 becomes stuck or is running under speed.
“1” indicates Remote 2 high temperature limit has been exceeded. If the temperature
is still outside the Remote 2 Temp High Limit, this bit reasserts on the next monitoring
cycle.
“1” indicates Remote 2 low temperature limit exceeded (below). If the temperature is
still outside the Remote 2 Temp Low Limit, this bit reasserts on the next monitoring
cycle.
“1” indicates Remote 2 temperature THERM limit has been exceeded. This bit is
cleared on reading Status Register 2.
This bit is set to “1” if a short or open is detected on the Remote 2 temperature
channel. This test is only done on powerup, and if set to 1 cannot be cleared by
reading Status Register 2.
“1” indicates local temperature THERM limit has been exceeded. This bit clears on a
read of Status Register 2.
Set to “1” when THERM is pulled low as an input. This bit clears on a read of Status
Register 2.
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