W83791D Datasheet, PDF (3/46 Pages) Winbond – W83791D Winbond H/W Monitoring IC

W83791D
Preliminary
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.................................................................................................. 10
6.1 General Description...........................................................................................................................10
6.2 Access Interface ................................................................................................................................10
6.2.1 The first serial bus access timing ............................................................................ 10
6.3 Speech Function ................................................................................................................................11
6.3.1
6.3.2
6.3.3
6.3.4
General Description ................................................................................................. 11
Event Trigger Queue ............................................................................................... 11
Connection of EEPROM .......................................................................................... 12
Speaker Output ....................................................................................................... 13
6.4 Address Resolution Protocol (ARP) Introduction ...............................................................................14
6.5 ASF(Alert Standard Format) Introduction ..........................................................................................16
6.5.1 Platform Event Trap (PET)....................................................................................... 16
6.6 Analog Inputs ....................................................................................................................................19
6.6.1
6.6.2
Monitor over 4.096V voltage: ................................................................................... 19
Monitor negative voltage:......................................................................................... 20
6.7 FAN Speed Count and FAN Speed Control........................................................................................21
6.7.1
6.7.2
6.7.3
Fan speed count...................................................................................................... 21
Fan speed control.................................................................................................... 22
Smart Fan Control ................................................................................................... 23
6.8 Temperature Measurement Machine ..................................................................................................25
6.8.1
6.8.2
6.8.3
6.8.4
6.8.5
Monitor temperature from thermistor: ....................................................................... 25
Monitor temperature from Pentium II^TM thermal diode or bipolar transistor 2N3904... 25
SMI# interrupt for W83791D Voltage........................................................................ 26
SMI# interrupt for W83791D Fan ............................................................................. 26
SMI# interrupt for W83791D temperature sensor 1/2/3 ........................................................................
ii
Publication Release Date: Aug, 2001
Revision 0.41