參數(shù)資料
型號: AMD-640
廠商: Advanced Micro Devices, Inc.
英文描述: 64-Bit Socket 7 Interface, Integrated Write back Cache Controller, System Memory Controller, and PCI Bus Controller.(64位系統(tǒng)控制器(包括高速緩沖存儲器控制器,系統(tǒng)存儲器控制器和PCI總線控制器))
中文描述: 64位Socket 7的接口,集成寫回高速緩沖存儲器控制器,系統(tǒng)內(nèi)存控制器和PCI總線控制器。(64位系統(tǒng)控制器(包括高速緩沖存儲器控制器,系統(tǒng)存儲器控制器和的PCI總線控制器))
文件頁數(shù): 87/159頁
文件大?。?/td> 1900K
代理商: AMD-640
5-48
Functional Operation
AMD-640 System Controller Data Sheet
21090C/0—June 1997
Preliminary Information
PCI Bus Initiator
Write:
L1 Miss, Unmodified
L2 Hit
Figure 5-30 shows a PCI write to DRAM. L1 and L2 are
snooped. L1 is a miss and L2 is a hit. The L2 line is not written
back because it is not modified. The line is simply marked
invalid because new data is written into the DRAM.
Figure 5-30. PCI Bus Initiator Write: L1 Miss, Unmodified L2 Hit
Addr
MWR
A
C
D
Write to DRAM buffer
Snoop L1
Hit L2
Snoop L2
A,B
C,D
Write to DRAM
Mark Line Invalid
HCLK
W/R#
ADS#
EADS#
BRDY#
HA[31:3]
BE[7:0]#
COE#
CADS#
KEN#/INV
CACHE#
HITM#
BOFF#
TAGWE#
TA[9:0]
HD[63:0]
MD[63:0]
MA[13:0]
RAS[5:0]#
CAS[7:0]#
WEx#
PCLK
FRAME#
DEVSEL#
AD[31:0]
C/BE[3:0]#
IRDY#
TRDY#
B
AHOLD
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