Rainbow Electronics LM96000 - Manual (Page 15)

Functional Description
(Continued)
Bit Name R/W Default Description
4 Zone 1 Limit
Exceeded
R 0 The LM96000 automatically sets this bit to 1 when the temperature input
measured by 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
Exceeded
R 0 The LM96000 automatically sets this bit to 1 when the temperature input
measured by 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
Exceeded
R 0 The LM96000 automatically sets this bit to 1 when the temperature input
measured by 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
Register 2
R 0 If there is a set bit in Status Register 2, this bit will be set to 1.
4.9 Register 42h: Interrupt Status Register 2
Register
Address
Read/
Write
Register
Name
Bit 7
(MSB)
Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
(LSB)
Default
Value
42h R Interrupt Status Register 2 ERR2 ERR1 FAN4 FAN3 FAN2 FAN1 RES 12V 00h
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.
6 Remote Diode
1 Fault
R 0 The LM96000 automatically sets this bit to 1 when there is either a short
or open circuit fault on the Remote1+ or Remote1− thermal diode input
pins. A diode fault will also set bit 4, Diode 1 Zone Limit bit, of Interrupt
Status Register 1.
LM96000
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