AMD SB600 User Manual

Page 174

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©2008 Advanced Micro Devices, Inc.

SMBus Module and ACPI Block (Device 20, Function 0)

AMD SB600 Register Reference Manual

Proprietary

Page 174

PIO7654Enable - RW – 8 bits - [PM_Reg: A8h]

Field Name

Bits

Default

Description

ProgramIo5Enable

1

0b

Enables IO monitoring for ProgramIO5 (defined by index A2,
A3).
1 = On
0 = Off

ProgramIo6Enable

2

0b

Enables IO monitoring for ProgramIO6 (defined by index A4,
A5).
1 = On
0 = Off

ProgramIo7Enable

3

0b

Enables IO monitoring for ProgramIO7 (defined by index A6,
A7).
1 = On
0 = Off

Spare 7:4

0h

Scratch

bits

PIO7654Enable register

PIO7654Status - RW – 8 bits - [PM_Reg: A9h]

Field Name

Bits

Default

Description

ProgramIo4Status

0

0b

Programmable IO 4 status bit; write 1’b1 to clear the status
bit

ProgramIo5Status

1

0b

Programmable IO 5 status bit; write 1’b1 to clear the status
bit

ProgramIo6Status

2

0b

Programmable IO 6 status bit; write 1’b1 to clear the status
bit

ProgramIo7Status

3

0b

Programmable IO 7 status bit; write 1’b1 to clear the status
bit

Spare 7:4

0h

Scratch

bits

PIO7654Status register

PllDebug– R/W – 8 bits - [PM_Reg: B0h]

Field Name

Bits

Default

Description

PLL_debug_delay
(available after A13)

7:0

08h

These bits are for PLL debugging purposes.

PllDebug register

PllDebug– R/W – 8 bits - [PM_Reg: B1h]

Field Name

Bits

Default

Description

PLL_debug_range
(available after A13)

5:0

00_1001b

These bits are for PLL debugging purposes.

Spare 7:6

00b

Scratch

bits

PllDebug register

AltDebugBusCntrl – R/W – 8 bits - [PM_Reg: B2h]

Field Name

Bits

Default

Description

Disable IDE block
(available after A13)

0

0b

This bit is used to disable entire IDE block.

Spare 7:1

00h

Scratch

bits

AltDebugBusCntrl register

C2Count - R – 8 bits - [PM_Reg: B3h]

Field Name

Bits

Default

Description

C2Count

7:0

00h

The value shows the amount of time the CPU spends in C2.
Each increment represents approximately 0.39% (1/256).
This register is updated by HW automatically every second

C2Count register

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