W83791G Datasheet, PDF (3/99 Pages) Winbond – Winbond H/W Monitoring IC

W83791D/G
Table of Contents-
1. GENERAL DESCRIPTION............................................................................................................ 1
2. FEATURES.................................................................................................................................... 3
2.1 Monitoring Items .................................................................................................................. 3
2.2 Address Resolution Protocol (ARP) and Alert-Standard Forum (ASF) ............................... 3
2.3 Speech Items ....................................................................................................................... 3
2.4 Actions Enabling .................................................................................................................. 3
2.5 Enhance Monitoring VID function ........................................................................................ 4
2.6 General ................................................................................................................................ 4
2.7 Package ............................................................................................................................... 4
3. KEY SPECIFICATIONS................................................................................................................. 4
4. PIN CONFIGURATION.................................................................................................................. 5
5. PIN DESCRIPTION ....................................................................................................................... 6
6. FUNCTION DESCRIPTION ........................................................................................................ 11
6.1 General Description ........................................................................................................... 11
6.2 Access Interface ................................................................................................................ 11
6.2.1 The first serial bus access timing .......................................................................................11
6.3 Speech Function ................................................................................................................ 12
6.3.1 General Description............................................................................................................12
6.3.2 Event Trigger Queue ..........................................................................................................12
6.3.3 Connection of EEPROM.....................................................................................................14
6.3.4 Speaker Output ..................................................................................................................14
6.4 Address Resolution Protocol (ARP) Introduction............................................................... 15
6.5 ASF (Alert Standard Format) Introduction ......................................................................... 17
6.5.1 Platform Event Trap (PET) .................................................................................................17
6.6 Analog Inputs ..................................................................................................................... 19
6.6.1 Monitor over 4.096V voltage:..............................................................................................20
6.6.2 Monitor negative voltage: ...................................................................................................20
6.7 FAN Speed Count and FAN Speed Control ...................................................................... 21
6.7.1 Fan speed count.................................................................................................................21
6.7.2 Fan speed control...............................................................................................................22
6.7.3 Smart Fan Control ..............................................................................................................23
6.8 Temperature Measurement Machine................................................................................. 24
6.8.1 Monitor temperature from thermistor: .................................................................................25
6.8.2 Monitor temperature from Pentium IITM thermal diode or bipolar transistor 2N3904 .........25
6.8.3 SMI# interrupt for W83791D Voltage..................................................................................25
6.8.4 SMI# interrupt for W83791D Fan........................................................................................26
6.8.5 SMI# interrupt for W83791D/G temperature sensor 1/2/3 ..................................................26
6.8.6 Over-Temperature (OVT#) for W83791D/G temperature sensor 1/2/3...............................27
7. CONTROL AND STATUS REGISTER........................................................................................ 29
7.1 Speech Flash Memory Address Registers ⎯ Index 00h-02h (Bank 0)............................. 29
7.2 Speech Flash Memory Data Registers ⎯ Index 03h-06h (Bank 0) .................................. 29
7.3 Speech Flash Memory Control Register ⎯ Index 07h (Bank 0)........................................ 29
7.4 Event Trigger Timeout Register ⎯ Index 08h (Bank 0)..................................................... 30
Publication Release Date: April 14, 2006
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Revision 1.1