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ADM1024ARUZ Datasheet(PDF) 26 Page - ON Semiconductor

Part No. ADM1024ARUZ
Description  System Hardware Monitor with Remote Diode Thermal Sensing
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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ADM1024ARUZ Datasheet(HTML) 26 Page - ON Semiconductor

 
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ADM1024
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26
Table 9. Register 40h, Configuration Register 1 (Power−On Default, 08h)
Bit
Name
R/W
Description
0
START
R/W
Logic 1 enables startup of ADM1024; Logic 0 places it in standby mode. Caution:
The outputs of the interrupt pins will not be cleared if the user writes a 0 to this
location after an interrupt has occurred (see “INT Clear” bit). At startup, limit
checking functions and scanning begins. Note, all high and low limits should be set
into the ADM1024 prior to turning on this bit (Power−On Default = 0).
1
INT_Enable
R/W
Logic 1 enables the INT_output. 1 = Enabled 0 = Disabled (Power−On Default = 0).
2
THERM
Enable
R/W
0 = THERM disabled
1 = THERM enabled
3
INT_Clear
R/W
During Interrupt Service Routine (ISR), this bit is asserted Logic 1 to clear INT output
without affecting the contents of the Interrupt Status Register. The device will stop
monitoring. It will resume upon clearing of this bit. (Power−On Default = 0)
4
RESET
R/W
Setting this bit generates a low going 45 ms reset pulse at Pin 12. This bit is
self−clearing and power−on default is 0.
5
Reserved
R/W
Default = 0
6
THERM CLR
R/W
A 1 clears the THERM output without changing the Status Register contents.
7
Initialization
R/W
Logic 1 restores power−on default values to the Configuration Register, Interrupt
Status Registers, Interrupt Mask Registers, Fan Divisor Register, and the
Temperature Configuration Register. This bit automatically clears itself since the
power−on default is 0.
Table 10. Register 41h, Interrupt Status Register 1 (Power−On Default, 00h)
Bit
Name
R/W
Description
0
2.5 V/External Temp2
Error
Read only
A 1 indicates that a High or Low limit has been exceeded.
1
VCCP1 Error
Read only
A 1 indicates that a High or Low limit has been exceeded.
2
VCC Error
Read only
A 1 indicates that a High or Low limit has been exceeded.
3
5.0 V Error
Read only
A 1 indicates that a High or Low limit has been exceeded.
4
Internal Temp Error
Read only
A 1 indicates that a temperature interrupt has been set, or that a High or Low limit
has been exceeded.
5
External Temp1 Error
Read only
A 1 indicates that a temperature interrupt has been set, or that a High or Low limit
has been exceeded.
6
FAN1/AIN1 Error
Read only
A 1 indicates that a High or Low limit has been exceeded.
7
FAN2/AIN2 Error
Read only
A 1 indicates that a High or Low limit has been exceeded.
Table 11. Register 42h, Interrupt Status Register 2 (Power−On Default, 00h) (Note 1 and 2)
Bit
Name
R/W
Description
0
12 V Error
Read only
A 1 indicates a High or Low limit has been exceeded.
1
VCCP2 Error
Read only
A 1 indicates a High or Low limit has been exceeded.
2
Reserved
Read only
Undefined.
3
Reserved
Read only
Undefined.
4
Chassis Error
Read only
A 1 indicates Chassis Intrusion has gone high.
5
THERM Interrupt
Read only
Indicates that THERM pin has been pulled low by an external source.
6
D1 Fault
Read only
Short or Open−Circuit Sensor Diode D1.
7
D2 Fault
Read only
Short or Open−Circuit Sensor Diode D2.
1. Any time the Status Register is read out, the conditions (i.e., Register) that are read are automatically reset. In the case of the channel priority
indication, if two or more channels were out of limits, then another indication would automatically be generated if it was not handled during
the ISR.
2. In the Mask Register, the errant voltage interrupt may be disabled until the operator has time to clear the errant condition or set the limit
higher/lower.


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