W83L784 데이터 시트보기 (PDF) - Winbond

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W83L784

Winbond H/W Monitoring IC

Winbond 

W83L784R

Preliminary

TABLE OF CONTENTS

1. GENERAL DESCRIPTION....................................................................................................................5

2. FEATURES..............................................................................................................................................6

2.1 MONITORING ITEMS................................................................................................................................6

2.2 ACTIONS ENABLING................................................................................................................................6

2.3 POWER GOOD .........................................................................................................................................6

2.4 GENERAL ...............................................................................................................................................6

2.5 PACKAGE................................................................................................................................................6

3. KEY SPECIFICATIONS ........................................................................................................................7

4. PIN CONFIGURATION .........................................................................................................................7

5. PIN DESCRIPTION ................................................................................................................................8

6. FUNCTIONAL DESCRIPTION ...........................................................................................................10

6.1 GENERAL DESCRIPTION.........................................................................................................................10

6.2 ACCESS INTERFACE...............................................................................................................................10

6.2.1 The first serial bus access timing are shown as follow:.................................................................10

6.2.2 The serial bus timing of the temperature CPUT1 and CPUT2 is shown as follow: ........................11

6.3 ANALOG INPUTS ...................................................................................................................................15

6.3.1 Monitor over 4.096V voltage: ......................................................................................................15

6.3.2 Power good for 3V and 5V ...........................................................................................................16

6.3.3 Battery Fault Alarm .....................................................................................................................17

6.4 TEMPERATURE MEASUREMENT MACHINE ..............................................................................................17

6.4.1 Monitor temperature from thermistor:..........................................................................................17

6.4.2 Monitor temperature from Pentium IITM thermal diode or bipolar transistor 2N3904 ...................18

6.4.3 Over Temperature ........................................................................................................................18

6.5 FAN SPEED COUNT AND FAN SPEED CONTROL.....................................................................................20

6.5.1 Fan speed count...........................................................................................................................20

6.5.2 Fan speed control ........................................................................................................................21

6.5.3 Smart Fan Control .......................................................................................................................22

6.5.4 Fan Fault Alarm ..........................................................................................................................24

6.6 SMI# ...................................................................................................................................................24

6.6.1 Temperature.................................................................................................................................24

6.6.2 Voltage ........................................................................................................................................26

6.6.3 Fan ..............................................................................................................................................26

7. REGISTERS AND RAM.......................................................................................................................27

7.1 CONFIGURATION REGISTER  INDEX 40H..............................................................................................27

7.2 INTERRUPT STATUS REGISTER 1 INDEX 41H........................................................................................27

Confidential, For Beta-site Only

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Publication Release Date: Sep.

1999

Revision 0.54

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