Datasheet

LM96000
SNAS234C –APRIL 2004–REVISED MARCH 2013 www.ti.com
Bit Name R/W Default Description
0 2.5V_Error R 0 The LM96000 automatically sets this bit to 1 when the 2.5V input voltage is less than
or equal to the limit set in the 2.5V Low Limit register or greater than the limit set in
the 2.5V High Limit register.
1 VCCP_Error R 0 The LM96000 automatically sets this bit to 1 when the VCCP input voltage is less
than or equal to the limit set in the VCCP Low Limit register or greater than the limit
set in the VCCP High Limit register.
2 3.3V_Error R 0 The LM96000 automatically sets this bit to 1 when the 3.3V input voltage is less than
or equal to the limit set in the 3.3V Low Limit register or greater than the limit set in
the 3.3V High Limit register.
3 5V_Error R 0 The LM96000 automatically sets this bit to 1 when the 5V input voltage is less than or
equal to the limit set in the 5V Low Limit register or greater than the limit set in the 5V
High Limit register.
4 Zone 1 Limit R 0 The LM96000 automatically sets this bit to 1 when the temperature input measured by
Exceeded the Remote1− and Remote1+ inputs is less than or equal to the limit set in the
Processor (Zone1) Low Temp register or more than the limit set in the Processor
(Zone1) High Temp register. This bit will be set when a diode fault is detected.
5 Zone 2 Limit R 0 The LM96000 automatically sets this bit to 1 when the temperature input measured by
Exceeded the internal temperature sensor is less than or equal to the limit set in the Internal
(Zone2) Low Temp register or greater than the limit set in the Internal (Zone2) High
Temp register.
6 Zone 3 Limit R 0 The LM96000 automatically sets this bit to 1 when the temperature input measured by
Exceeded the Remote2− and Remote2+ inputs is less than or equal to the limit set in the
Internal (Zone2) Low Temp register or greater than the limit set in the Remote
(Zone3) High Temp register. This bit will be set when a diode fault is detected.
7 Error in Status R 0 If there is a set bit in Status Register 2, this bit will be set to 1.
Register 2
4.9 Register 42h: Interrupt Status Register 2
Register Read/ Register Bit 7 Bit 0 Default
Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
Address Write Name (MSB) (LSB) Value
42h R Interrupt ERR2 ERR1 FAN4 FAN3 FAN2 FAN1 RES 12V 00h
Status
Register
2
The Interrupt Status Register 2 bits will be automatically set, by the LM96000, whenever a fault condition is
detected. Interrupt Status Register 2 identifies faults caused by temperature sensor error, fan speed droping
below minimum set by the tachometer minimum register, the 12V input voltage going outside the window set by
its limit registers. Interrupt Status Register 2 will hold a set bit until the event is read by software. The contents of
this register will be cleared (set to 0) automatically by the LM96000 after it is ready by software, if fault condition
no longer exists. Once set, the Interrupt Status Register 2 bits will remain set until a read event occurs, even if
the fault no longer exists
This register is read only — a write to this register has no effect.
Bit Name R/W Default Description
0 +12V_Error R 0 The LM96000 automatically sets this bit to 1 when the 12V input voltage either falls
below the limit set in the 12V Low Limit register or exceeds the limit set in the 12V
High Limit register.
1 Reserved R 0 Reserved
2 Fan1 Stalled R 0 The LM96000 automatically sets this bit to 1 when the TACH1 input reading is above
the value set in the Tach1 Minimum MSB and LSB registers.
3 Fan2 Stalled R 0 The LM96000 automatically sets this bit to 1 when the TACH2 input reading is above
the value set in the Tach2 Minimum MSB and LSB registers.
4 Fan3 Stalled R 0 The LM96000 automatically sets this bit to 1 when the TACH3 input reading is above
the value set in the Tach3 Minimum MSB and LSB registers.
5 Fan4 Stalled R 0 The LM96000 automatically sets this bit to 1 when the TACH4 input reading is above
the value set in the Tach4 Minimum MSB and LSB registers.
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