W83781D datasheet(11/54 Pages) WINBOND

Part #	W83781D

Description	H/W MONITORING IC

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Manufacturer	WINBOND [Winbond]

Direct Link	http://www.winbond.com

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W83781D/W83781G

Publication Release Date: April 14, 2005

- 7 -

Revision 2.0

The register structure is showed as the diagram next page.

The second interface use Serial Bus. In the W83781D/G has three serial bus address. That is, the first

address defined at CR48 can read/write all registers excluding Bank 1 and Bank 2 temperature 2/3

registers, the second address defined at CR4A.bit2-0 only read/write temperature sensor 2 registers,

and the third address defined at CR4A.bit6-4 only can access (read/write) temperature sensor 3

registers.

Configuration Register

40h

Interrupt Status Registers

41h, 42h

SMI# & IRQ Mask Registers

42h, 43, 44h, 45h

VID<3:0>/Fan Divisor Register

47h

Serial Bus Address

48h

Monitor Value Registers

20h~3Fh

and

60h~7Fh (auto-increment)

VID<4>/Device ID

49h

Temperature 2, 3 Serial

Bus Address

4Ah

Pin Control Register

4Bh

IRQ Polarity Select

4Ch

Fan IN/OUT and BEEP/GPO#

Control Register

4Dh

Select Bank for 50h~5Fh Reg.

4Eh

Winbond Vendor ID

4Fh

BANK 0

R-T Table Value

BEEP Control Register

Winbond Test Register

50h~58h

BANK 1

Temperature 2 Control/Staus

Registers

50h~56h

BANK 2

Temperature 3 Control/Staus

Registers

50h~56h

Data

Register

Port 6h

Port 5h

Index

Register

ISA

Data

Bus

ISA

Address

Bus

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