VT8231 datasheet(97/132 Pages) ETC

97 / 132 page

VT8231

Preliminary Revision 0.8 October 29, 1999

-91-

Function 4 Regs - Power Management, SMBus and HWM

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Hardware-Monitor-Specific Configuration Registers

Offset 71-70 – Hardware Monitor I/O Base ...................RW

15-7 I/O Base (128-byte I/O space) ................. default = 0

6-0

Fixed

.......................... always reads 0000001b

Offset 74 –Hardware Monitor Control ...........................RW

7-4

Reserved

........................................ always reads 0

Hardware Monitoring Interrupt

SMI

.....................................................default

1SCI

2-1

Reserved

........................................ always reads 0

Hardware Monitoring I/O Enable

Disable hardware monitor functions.......default

Enable hardware monitor functions

System Management Bus-Specific Configuration Registers

Offset 93-90 – SMBus I/O Base ....................................... RW

31-16 Reserved

........................................ always reads 0

15-4 I/O Base (16-byte I/O space)................ default = 00h

3-0

Fixed

................................ always reads 0001b

Offset D2 – SMBus Host Configuration ......................... RW

7-4

Reserved

........................................ always reads 0

SMBus Interrupt Select

SMI

.................................................... default

1SCI

Reserved

........................................ always reads 0

1SMBus IRQ

Disable................................................... default

1Enable

SMBus Host Controller Enable

Disable SMB controller functions ......... default

Enable SMB controller functions

Offset D3 – SMBus Host Slave Command...................... RW

7-0

SMBus Host Slave Command Code.......... default=0

Offset D4 – SMBus Slave Address for Port 1................. RW

7-0

SMBus Slave Address for Port 1............... default=0

Bit-0 must be set to 0 for proper operation

Offset D5 – SMBus Slave Address for Port 2................. RW

7-0

SMBus Slave Address for Port 2............... default=0

Bit-0 must be set to 0 for proper operation

Offset D6 – SMBus Revision ID ....................................... RO

7-0

SMBus Revision Code

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