Product specifications

VT1211 LPC SuperIO and Hardware Monitor
Revision 1.0 January 8, 2002 -43- Register Descriptions – Hardware Monitor I/O
Technologies, Inc.
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Offset 2B – UCH2 High Limit..........................................RW
Offset 2C – UCH2 Low Limit ..........................................RW
Offset 2D – UCH3 High Limit .........................................RW
Offset 2E – UCH3 Low Limit ..........................................RW
Offset 2F – UCH4 High Limit..........................................RW
Offset 30 – UCH4 Low Limit ...........................................RW
Offset 31 – UCH5 High Limit ..........................................RW
Offset 32 – UCH5 Low Limit ...........................................RW
Offset 33 – Internal +3.3V High Limit ............................RW
Offset 34 – Internal +3.3V Low Limit.............................RW
Offset 39 – Hot Temp Limit (H) (For Temp Reading 1)RW
Offset 3A – Hot Temperature Hysteresis Limit (Low) ..RW
Offset 3B – FAN 1 Fan Count Limit (FIN0)...................RW
Note: It is the number of counts of the internal clock for the
Low Limit of the fan speed.
Offset 3C – FAN 2 Fan Count Limit (FIN1)...................RW
Note: It is the number of counts of the internal clock for the
Low Limit of the fan speed.
Offset 3D – UCH1 High Limit (Default for Temperature
Reading 2) ......................................................................... RW
Offset 3E – UCH1 Low Limit.......................................... RW
Offset 3F – Stepping ID Number .................................... RW
Setting all ones to the high limits for voltages and fans (1111
1111 binary for temperature) means interrupts will never be
generated except the case when voltages go below the low
limits.
Note: For the high limits of the voltages, the device is doing a
greater-than comparison. For the low limits, however, it is
doing a less than or equal comparison.