W83791G Nuvoton Technology Corporation of America, W83791G Datasheet - Page 3

• Manufacturer Part Number: W83791G
• Description: IC MONITOR H/W 48-LQFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83791G

• Function: Hardware Monitor
• Topology: ADC
• Sensor Type: External
• Sensing Temperature: External Sensor
• Output Type: I²C™
• Output Alarm: Yes
• Output Fan: Yes
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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