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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 100
Revision ID/Class Code- R - 32 bits - [PCI_Reg: 08h]
Field Name Bits Default Description
RevisionID 7:0 11h /
12h /
13h
This field reflects the ASIC revision.
11h : For ASIC revision A11
12h : For ASIC revision A12
13h : For ASIC revision A13
For ASIC revisions after A13, by default this field will read 13h
still. However, if SMBUS PCI config 70h bit 8 is set to 1, a
hidden revision ID can be read from this field.
Class Code 31:8 0C0500h 0C0500h denotes a SMBUS controller.
Revision ID/Class Code register
Cache Line Size- R - 8 bits - [PCI_Reg: 0Ch]
Field Name Bits Default Description
Cache Line Size 7:0 00h This register specifies the system cacheline size. This module
does not use Memory Write and Invalidate command and so
this register is not applicable. It is hardcoded to 0.
Cache line size register
Latency Timer- R - 8 bits - [PCI_Reg: 0Dh]
Field Name Bits Default Description
Latency Timer 7:0 00h This register specifies the value of the Latency Timer. This is
not used in this module and so it is always 0.
Latency timer register
Header Type- R - 8 bits - [PCI_Reg: 0Eh]
Field Name Bits Default Description
Header Type 7:0 80h This device is a multifunction device.
Header type register
BIST- R - 8 bits - [PCI_Reg: 0Fh]
Field Name Bits Default Description
BIST 7:0 00h The module has no built-in self-test and so this is always 0.
BIST register
Base Address 0- R - 32 bits - [PCI_Reg: 10h]
Field Name Bits Default Description
IO/Memory 0 1b 1 = IO
0 = Memory
Reserved 3:1 000b
SmBusBaseAd 31:4 0000000h SMBus Base Address
Base Address 0 register
Base Address 1- R - 32 bits - [PCI_Reg: 14h]
Field Name Bits Default Description
Reserved 9:0 000h Hardwired to 0; memory map only
MultiMediaTimerBaseAd
dr
31:10 000000h High Precision Event Timer (also called Multi-media Timer)
base address.
Base Address 1 register
Base Address 2- R - 32 bits - [PCI_Reg: 18h]
Field Name Bits Default Description
Base Address 2 31:0 0000_000
0h
Not used and is hardcoded to 0.