
W83783S
Preliminary
Publication Release Date: April 1999
- I -
Version
0.55
TABLE OF CONTENTS
1. GENERAL DESCRIPTION.......................................................................................................................1
2. FEATURES.....................................................................................................
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2.1 Monitoring Items...................................................................................................................................2
2.2 Actions Enabling...................................................................................................................................2
2.3 General..................................................................................................................................................2
2.4 Package .................................................................................................................................................2
3. KEY SPECIFICATIONS............................................................................................................................3
4. PIN CONFIGURATION.............................................................................................................................3
5. PIN DESCRIPTION....................................................................................................................................4
6. FUNCTIONAL DESCRIPTION.................................................................................................................6
6.1 General Description...............................................................................................................................6
6.2 Access Interface.....................................................................................................................................6
6.2.1 The first serial bus access timing are shown as follow:.....................................................................6
6.2.2 The serial bus timing of the temperature 2 and 3 is shown as follow:................................................7
6.3 Analog Inputs......................................................................................................................................10
6.3.1 Monitor over 4.096V voltage:.........................................................................................................11
6.3.2 Monitor negative voltage:..............................................................................................................12
6.3.3 Monitor temperature from thermistor:............................................................................................13
6.3.4 Monitor temperature from Pentium II
TM
thermal diode or bipolar transistor 2N3904 .....................13
6.4 FAN Speed Count and FAN Speed Control..........................................................................................14
6.4.1 Fan speed count.............................................................................................................................14
6.4.2 Fan speed control...........................................................................................................................15
6.5 Temperature Measurement Machine....................................................................................................16
6.5.1 The W83783S temperature sensor 2 SMI# interrupt has two modes:...............................................17
6.5.2 The W83783S temperature sensor 1 SMI# interrupt has three modes..............................................18
6.5.3 The W83783S temperature sensor 1 Over-Temperature (OVT#) has three modes............................19
6.6 Voltage and Fan SMI# mode :..............................................................................................................20
6.6.1 Voltage SMI# mode :......................................................................................................................20
6.6.2 Fan SMI# mode :............................................................................................................................20