W83L785R Datasheet, PDF (3/38 Pages) Winbond – WINBOND H/W MONITORING IC FOR NOTEBOOK

W83L785R/W83L785G
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 .............................................................................................................. 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 follow: .......................................................6
6.3 Monitoring Time ............................................................................................................. 7
6.4 Analog Inputs ................................................................................................................. 7
6.4.1 Voltage Monitor input can not be over 2.048V:.................................................................8
6.5 Temperature Measurement Machine............................................................................. 8
6.5.1 Monitor temperature from thermistor: ...............................................................................9
6.5.2 Monitor temperature from Pentium IITM thermal diode ....................................................9
6.5.3 Over Temperature signal (OVT#) .....................................................................................9
6.5.4 Temperature Fault (Temp_fault #)..................................................................................10
6.6 FAN Speed Count and FAN Speed Control ................................................................ 11
6.6.1 Fan speed count.............................................................................................................11
6.6.2 Fan speed control...........................................................................................................12
6.7 SMI# ............................................................................................................................. 12
6.7.1 Temperature...................................................................................................................12
6.7.2 Voltage ...........................................................................................................................14
6.7.3 Fan .................................................................................................................................14
7. CONTENT OF DATA REGISTERS .......................................................................................... 15
7.1 Configuration Register  Index 40h............................................................................ 15
7.2 SMI# Status Register 1  Index 41h........................................................................... 15
7.3 Reserved  Index 42h ................................................................................................ 16
7.4 SMI# Mask Register 1  Index 43h ............................................................................ 16
7.5 Reserved  Index 44h ................................................................................................ 16
7.6 Real Time Hardware Status Register I  Index 45h................................................... 17
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