參數(shù)資料
型號： PI7C7300DNAE
廠商： Pericom
文件頁數(shù)： 79/107頁
文件大?。?/td> 0K
描述： IC PCI-PCI BRIDGE 3PORT 272-BGA
標準包裝： 40
系列： *
應用： *
接口： *
電源電壓： *
封裝/外殼： 272-BBGA
供應商設(shè)備封裝： 272-PBGA（27x27）
包裝： 管件
安裝類型： 表面貼裝
PI7C7300D
3-PORT PCI-TO-PCI BRIDGE
Page 73 of 107
Pericom Semiconductor
November 2005 - Revision 1.01
P_CBE [3:0] #
Command
Action
1.
If the target bus is the bridges secondary bus:
claim and pass through as a special cycle.
2.
If the target bus is a subordinate bus that exists
behind the bridge (but not equal to the secondary
bus): claim and pass through unchanged as a type
1 Configuration Write.
3.
Otherwise ignore
1100
Memory Read
Multiple
Same as Memory Read
1101
Dual Address Cycle
Supported
1110
Memory Read Line
Same as Memory Read
1111
Memory Write and
Invalidate
Same as Memory Read
13.2
SECONDARY INTERFACE
S1_CBE [3:0] #
S2_CBE [3:0] #
Command
Action
0000
Interrupt
Acknowledge
Ignore
0001
Special Cycle
Do not claim. Ignore.
0010
I/O Read
Same as Primary Interface
0011
I/O Write
Same as I/O Read.
0100
Reserved
-----
0101
Reserved
-----
0110
Memory Read
Same as Primary Interface
0111
Memory Write
Same as Memory Read.
1000
Reserved
-----
1001
Reserved
-----
1010
Configuration Read
Ignore
1011
Configuration Write
I.
Type 0 Configuration Write: Ignore
II. Type 1 Configuration Write (not special cycle
request):Ignore
III. Configuration Write as Special Cycle Request (device
= 1Fh, function = 7h):
1.
If the target bus is the bridge’s primary bus: claim and
pass through as a Special Cycle
2.
If the target bus is neither the primary bus nor is it in
range of buses defined by the bridge’s secondary and
subordinate bus registers: claim and pass through
unchanged as a Type 1 Configuration Write.
3.
If the target bus is not the bridge’s primary bus, but is
in range of buses defined by the bridge’s secondary and
subordinate bus registers: ignore.
1100
Memory Read
Multiple
Same as Memory Read
1101
Dual Address Cycle
Supported
1110
Memory Read Line
Same as Memory Read
1111
Memory Write and
Invalidate
Same as Memory Read
14
CONFIGURATION REGISTERS
As PI7C7300D supports two secondary interfaces, it has two sets of configuration
registers that are almost identical and accessed through different function numbers. PCI
configuration defines a 64-byte space (configuration header) to define various attributes
of the PCI-to-PCI Bridge as shown below. There are two configuration registers:
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