QG5000X S L9TH Intel, QG5000X S L9TH Datasheet - Page 376

• Manufacturer Part Number: QG5000X S L9TH
• Manufacturer: Intel

Specifications of QG5000X S L9TH

• Lead Free Status / RoHS Status: Compliant

Figure 5-38. SMBus Configuration Read (Word Writes / Word Reads, PEC Enabled)
Figure 5-39. SMBus Configuration Read (Write Bytes / Read Bytes, PEC Enabled)
5.16.4.3
Figure 5-40. SMBus Configuration Write (Block Write, PEC Enabled)
376
The following example uses byte reads.
Configuration Register Write Protocol
Configuration writes are accomplished through a series of SMBus writes. As with
configuration reads, a write sequence is first used to initialize the Bus Number, Device,
Function, and Register Number for the configuration access. The writing of this
information can be accomplished through any combination of the supported SMBus
write commands (block, word or byte).
Examples of configuration writes are illustrated below. For the definition of the diagram
conventions below, refer to the SMBus Specification, Revision 2.0.
S
Sr
Sr
Sr
S
S
S
S
S
Sr
Sr
Sr
Sr
Sr
S
S
S
S
S
S
S
S
S
11X0_XXX
11X0_XXX
11X0_XXX
11X0_XXX
11X0_XXX
11X0_XXX
11X0_XXX
11X0_XXX
11X0_XXX
11X0_XXX
11X0_XXX
11X0_XXX
11X0_XXX
11X0_XXX
11X0_XXX
11X0_XXX
11X0_XXX
11X0_XXX
11X0_XXX
11X0_XXX
11X0_XXX
11X0_XXX
11X0_XXX
WA
W A
W A
W A
R A
W A
R A
W A
R A
Cmd = 11011110
W A
W A
W A
W A
W A
R A
W A
R A
W A
R A
W A
R A
W A
R A
Cmd = 10010001
Cmd = 01010001
Cmd = 10010001
Cmd = 00010001
Cmd = 01010000
Data[23:16]
Data[7:0]
Status
A
Cmd = 10010000
Cmd = 00010000
Cmd = 00010000
Cmd = 01010000
Cmd = 10010000
Cmd = 00010000
Cmd = 00010000
Cmd = 00010000
Cmd = 01010000
Data[31:24]
Data[23:16]
Data[15:8]
Byte Count = 8
Data[7:0]
Status
A
A
A
A
A
A
A
A
Register Number[15:8]
A
A
Bus Number
Data[31:24]
Data[15:8]
PEC
Bus Number
A
A
A
A
A
A
A
A
A
A
A
A
A
A
Data[23:16]
Intel
Device/Function
®
Register[15:8]
Bus Number
Register[7:0]
5000X Chipset Memory Controller Hub (MCH) Datasheet
A
A
A
A
A
N P
A
PEC
PEC
PEC
PEC
PEC
Device/Function
Register Number[7:0]
Data[16:8]
Device/Function
PEC
PEC
A
A
A
A
N P
N P
N P
N P
N P
A Reg Number[15:8]
A
A
A
N P
N P
Data[7:0]
PEC
PEC
PEC
PEC
PEC
PEC
A
A
Functional Description
Reg Number [7:0]
PEC
CLOCK STRETCH
A P
A P
A P
A P
STRETCH
CLOCK
A
STRETCH
CLOCK
Data[31:24]
A P
A P
A P