W83781D/W83781G

Publication Release Date: April 14, 2005

- II -

Revision 2.0

Table Of Contents-

1.

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

2.

FEATURES ................................................................................................................................. 1

2.1

Monitoring Items ............................................................................................................. 1

2.2

Actions Enabling ............................................................................................................. 1

2.3

General ........................................................................................................................... 2

2.4

Package .......................................................................................................................... 2

3.

KEY SPECIFICATIONS .............................................................................................................. 2

4.

BLOCK DIAGRAM ...................................................................................................................... 3

5.

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

6.

PIN DESCRIPTION..................................................................................................................... 4

7.

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

7.1

General Description ........................................................................................................ 6

7.1.1

The first serial bus access timing is shown as follows: .....................................................8

7.1.2

The serial bus timing of the temperature 2 and 3 is shown as follows: .............................9

7.2

Analog Inputs................................................................................................................ 11

7.3

FAN Inputs and FAN Control........................................................................................ 12

7.4

Temperature Measurement Machine ........................................................................... 13

8.

CONTROL AND STATUS REGISTERS................................................................................... 15

8.1

Address Register (Port x5h) ......................................................................................... 15

8.2

Data Register (Port x6h) ............................................................................................... 18

8.3

Configuration Register – Index 40h (Bank 0) ............................................................... 18

8.4

Interrupt Status Register 1 – Index 41h (Bank 0) ......................................................... 19

8.5

Interrupt Status Register 2 – Index 42h (Bank 0) ......................................................... 19

8.6

SMI# Mask Register 1 – Index 43h (Bank 0)............................................................... 20

8.7

SMI# Mask Register 2 – Index 44h (Bank 0)................................................................ 20

8.8

IRQ Mask Register 2 – Index 45h (Bank 0).................................................................. 21