W83L784R_05 Datasheet, PDF (3/52 Pages) Winbond – Monitoring IC

W83L784R/G
Table of Contents-
1. GENERAL DESCRIPTION............................................................................................................. 1
2. FEATURES .................................................................................................................................... 1
2.1 Monitoring Items.................................................................................................................... 1
2.2 Actions Enabling.................................................................................................................... 2
2.3 Power Good .......................................................................................................................... 2
2.4 General.................................................................................................................................. 2
2.5 Package ................................................................................................................................ 2
3. KEY SPECIFICATIONS ................................................................................................................. 2
4. PIN CONFIGURATION .................................................................................................................. 3
5. PIN DESCRIPTION........................................................................................................................ 4
6. FUNCTIONAL DESCRIPTION....................................................................................................... 6
6.1 General Description............................................................................................................... 6
6.2 Access Interface.................................................................................................................... 6
6.2.1 The first serial bus access timing is shown as follows: ...........................................................6
6.2.2 The serial bus timing of the temperature CPUT1 and CPUT2 is shown as follow: .................7
6.3 Analog Inputs ........................................................................................................................ 9
6.3.1 Monitor over 4.096V voltage:................................................................................................10
6.3.2 Power good for 3V and 5V....................................................................................................10
6.3.3 Battery Fault Alarm...............................................................................................................11
6.4 Temperature Measurement Machine .................................................................................. 11
6.4.1 Monitor temperature from thermistor: ...................................................................................12
6.4.2 Monitor temperature from Pentium IITM thermal diode or bipolar transistor 2N3904 ...........12
6.4.3 Over Temperature ................................................................................................................12
6.5 FAN Speed Count and FAN Speed Control........................................................................ 13
6.5.1 Fan speed count...................................................................................................................14
6.5.2 Fan speed control.................................................................................................................15
6.5.3 Smart Fan Control ................................................................................................................16
6.5.4 Fan Fault Alarm ....................................................................................................................18
6.6 SMI# .................................................................................................................................... 18
6.6.1 Temperature.........................................................................................................................18
6.6.2 Voltage .................................................................................................................................20
6.6.3 Fan .......................................................................................................................................20
7. REGISTERS AND RAM ............................................................................................................... 21
7.1 Configuration Register -- Index 40h .................................................................................... 21
7.2 Interrupt Status Register 1 -- Index 41h .............................................................................. 21
7.3 Interrupt Status Register 2 -- Index 42h .............................................................................. 22
Publication Release Date: Apr. 2006
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Revision 1.1