W83783S

Preliminary

Publication Release Date: April 1999

- I -

Version

0.55

TABLE OF CONTENTS

1. GENERAL DESCRIPTION .......................................................................................................................1

2. FEATURES .....................................................................................................Error! Bookmark not defined.

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

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