W83783S Information Storage Devices, Inc, W83783S Datasheet - Page 3

• Manufacturer Part Number: W83783S
• Description: H/w Monitor: 3 Temp.(thermal Diode), 6 Vol., 2 PWM Fan Control
• Manufacturer: Information Storage Devices, Inc

1. GENERAL DESCRIPTION .......................................................................................................................1
2. FEATURES .....................................................................................................Error! Bookmark not defined.
3. KEY SPECIFICATIONS............................................................................................................................3
4. PIN CONFIGURATION.............................................................................................................................3
5. PIN DESCRIPTION....................................................................................................................................4
6. FUNCTIONAL DESCRIPTION.................................................................................................................6
2.1 Monitoring Items ...................................................................................................................................2
2.2 Actions Enabling ...................................................................................................................................2
2.3 General..................................................................................................................................................2
2.4 Package .................................................................................................................................................2
6.1 General Description ...............................................................................................................................6
6.2 Access Interface .....................................................................................................................................6
6.3 Analog Inputs ......................................................................................................................................10
6.4 FAN Speed Count and FAN Speed Control..........................................................................................14
6.5 Temperature Measurement Machine ....................................................................................................16
6.6 Voltage and Fan SMI# mode :..............................................................................................................20
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
6.3.1 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
6.4.1 Fan speed count .............................................................................................................................14
6.4.2 Fan speed control...........................................................................................................................15
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
6.6.1 Voltage SMI# mode :......................................................................................................................20
6.6.2 Fan SMI# mode :............................................................................................................................20
TABLE OF CONTENTS
TM
thermal diode or bipolar transistor 2N3904 .....................13
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Publication Release Date: April 1999
W83783S
Preliminary
Version
0.55