W83783S_04 Datasheet, PDF(3/56 Page) Winbond

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W83783S_04 Datasheet, PDF (3/56 Pages) Winbond – Monitoring IC

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W83783S

TABLE OF CONTENTS

1. GENERAL DESCRIPTION .............................................................................................................. 3

2. FEATURES ...................................................................................................................................... 4

2.1 MONITORING ITEMS......................................................................................................................... 4

2.2 ACTIONS ENABLING......................................................................................................................... 4

2.3 GENERAL ....................................................................................................................................... 4

2.4 PACKAGE ....................................................................................................................................... 4

3. KEY SPECIFICATIONS................................................................................................................... 5

4. PIN CONFIGURATION.................................................................................................................... 5

5. PIN DESCRIPTION.......................................................................................................................... 6

6. FUNCTIONAL DESCRIPTION ........................................................................................................ 8

6.1 GENERAL DESCRIPTION .................................................................................................................. 8

6.2 ACCESS INTERFACE ........................................................................................................................ 8

6.2.1 The first serial bus access timing are shown as follow: ........................................................ 8

6.2.2 The serial bus timing of the temperature 2 and 3 is shown as follow: .................................. 9

6.3 ANALOG INPUTS............................................................................................................................ 12

6.3.1 Monitor over 4.096V voltage: .............................................................................................. 13

6.3.2 Monitor negative voltage: .................................................................................................... 14

6.3.3 Monitor temperature from thermistor:.................................................................................. 15

6.3.4 Monitor temperature from Pentium IITM thermal diode or bipolar transistor 2N3904 .......... 15

6.4 FAN SPEED COUNT AND FAN SPEED CONTROL ............................................................................ 16

6.4.1 Fan speed count.................................................................................................................. 16

6.4.2 Fan speed control................................................................................................................ 17

6.5 TEMPERATURE MEASUREMENT MACHINE ....................................................................................... 18

6.5.1 The W83783S temperature sensor 2 SMI# interrupt has two modes:................................ 19

6.5.2 The W83783S temperature sensor 1 SMI# interrupt has three modes .............................. 20

6.5.3 The W83783S temperature sensor 1 Over-Temperature (OVT#) has three modes .......... 21

6.6 VOLTAGE AND FAN SMI# MODE : ................................................................................................... 22

6.6.1 Voltage SMI# mode :........................................................................................................... 22

6.6.2 Fan SMI# mode :................................................................................................................. 22

7. REGISTERS AND RAM ................................................................................................................ 24

7.1 CONFIGURATION REGISTER ï£§ INDEX 40H...................................................................................... 24

7.2 INTERRUPT STATUS REGISTER 1ï£§ INDEX 41H ............................................................................... 25

7.3 INTERRUPT STATUS REGISTER 2 ï£§ INDEX 42H .............................................................................. 25

7.4 SMI# MASK REGISTER 1 ï£§ INDEX 43H.......................................................................................... 26

7.5 SMI# MASK REGISTER 2 ï£§ INDEX 44H.......................................................................................... 27

7.6 RESERVED REGISTER ï£§ INDEX 45H-- 46H..................................................................................... 27

7.7 VID/FAN DIVISOR REGISTER ï£§ INDEX 47H .................................................................................... 28

7.8 SERIAL BUS ADDRESS REGISTER ï£§ INDEX 48H ............................................................................. 28

Publication Release Date: Oct. 2004

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Revision 1.1

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