Product specifications

VT1211 LPC SuperIO and Hardware Monitor
Revision 1.0 January 8, 2002 -50- Register Descriptions – Hardware Monitor I/O
Technologies, Inc.
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Offset 50 – PWM Clock Selection (00h)..........................RW
7-3 Reserved ........................................ always reads 0
2-0 PWM Clock Selection........................ default = 000b
000 90K Hz
001 45K Hz
010 22.5K Hz
011 11.25K Hz
100 5.63K Hz
101 2.8K Hz
110 1.4K Hz
111 700 Hz
Offset 51 – PWM Control (00h).......................................RW
7 Reserved ........................................ always reads 0
6-4 PWM 2 Input Selection
000 External Intel Thermal Sensor ...............default
001 Internal Thermal Sensor
010 External UCH1
011 External UCH2
100 External UCH3
101 External UCH4
110 External UCH5
111 External Intel Thermal Sensor
3 Reserved ........................................ always reads 0
2-0 PWM 1 Input Selection
000 External Intel Thermal Sensor ...............default
001 Internal Thermal Sensor
010 External UCH1
011 External UCH2
100 External UCH3
101 External UCH4
110 External UCH5
111 External Intel Thermal Sensor
Offset 52 –PWM Full Speed Temperature (00h) ...........RW
7-0 PWM Full Speed Temperature Value ..... def = 00h
Offset 53 – PWM High Speed Temperature (00h).........RW
7-0 PWM High Speed Temperature Value.... def = 00h
Offset 54 – PWM Low Speed Temperature (00h)..........RW
7-0 PWM Low Speed Temperature Value..... def = 00h
Offset 55 – PWM Fan Off Temperature (00h)...............RW
7-0 PWM Fan Off Temperature Value.......... def = 00h
Offset 56 – PWM 1 High Speed Duty Cycle (FFh)........ RW
Offset 57 – PWM 1 Low Speed Duty Cycle (FFh)........ RW
Offset 58 – PWM 2 High Speed Duty Cycle (FFh)........ RW
Offset 59 – PWM 2 Low Speed Duty Cycle (FFh)......... RW
Note: For these registers 00h = 0% duty cycle, FFh = 100%
Offset 5C – BEEP Event Enable ..................................... RW
7-3 Reserved ........................................always reads 0
2 Temperature Beep
0 Disable................................................... default
1 Enable (Beep when the temperature value
exceeds the limit)
1 Voltage Beep
0 Disable................................................... default
1 Enable (Beep when the voltage value exceeds
the limit)
0 Fan Beep
0 Disable................................................... default
1 Enable (Beep when the fan counter value
exceeds the limit)
Offset 5D – Fan Beep Frequency Divisor ....................... RW
7-4 Fan Event Tone Divisor........................... default = 0
Tone = 8Hz / (bits [7:4] + 1)
3-0 Fan Event Frequency Divisor ................. default = 0
Frequency = 8Kz / (bits [3:0] +1)
Offset 5E – Voltage Beep Frequency Divisor................. RW
7-4 Voltage Event Tone Divisor .................... default = 0
Tone = 8Hz / (bits [7:4] + 1)
3-0 Voltage Event Frequency Divisor........... default = 0
Frequency = 8Kz / (bits [3:0] +1)
Offset 5F – Temperature Beep Frequency Divisor........ RW
7-4 Temperature Event Tone Divisor ........... default = 0
Tone = 8Hz / (bits [7:4] + 1)
3-0 Temperature Event Frequency Divisor . default = 0
Frequency = 8Kz / (bits [3:0] +1)
Offset 60 – PWM1 Current Duty Cycle ......................... RW
Offset 61 – PWM2 Current Duty Cycle ......................... RW