W83782D Datasheet, PDF (3/73 Pages) Winbond – MONITORING IC

Preliminary W83782D
TABLE OF CONTENTS
1. GENERAL DESCRIPTION ............................................................................................1
2. FEATURES.......................................................................................................................2
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......................................................................................7
6.1 GENERAL DESCRIPTION...................................................................................................................7
6.2 ACCESS INTERFACE..........................................................................................................................7
6.2.1 ISA interface .................................................................................................................................7
6.2.2 I2C interface..................................................................................................................................9
6.2.3 The first serial bus access timing are shown as follow:...................................................................9
6.2.4 The serial bus timing of the temperature 2 and 3 is shown as follow: ...........................................11
6.3 ANALOG INPUTS ..............................................................................................................................14
6.3.1 Monitor over 4.096V voltage: ......................................................................................................15
6.3.2 Monitor negative voltage: ............................................................................................................15
6.3.3 Monitor temperature from thermistor:..........................................................................................16
6.3.4 Monitor temperature from Pentium IITM thermal diode or bipolar transistor 2N3904 .................16
6.4 FAN SPEED COUNT AND FAN SPEED CONTROL.........................................................................17
6.4.1 Fan speed count ...........................................................................................................................17
6.4.2 Fan speed control.........................................................................................................................19
Publication Release Date: April 1999
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Version A1