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參數(shù)資料
| 型號： | PI7C7300NA |
| 廠商： | PERICOM SEMICONDUCTOR CORP |
| 元件分類： | 總線控制器 |
| 英文描述： | PCI BUS CONTROLLER, PBGA272 |
| 封裝： | PLASTIC, BGA-272 |
| 文件頁數(shù)： | 89/119頁 |
| 文件大小： | 880K |
| 代理商： | PI7C7300NA |
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PI7C7300
3-PORT PCI-to-PCI BRIDGE
Advanced Information
61
06/04/02 Revision 1.07
13.2
Secondary Interface (continued)
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 PI7C7300 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: Configuration Register 1 and Configuration Register 2 corresponding to
Secondary Bus 1 and Secondary Bus 2 interfaces respectively. The configuration
for the Primary interface is implemented through Configuration Register 1.
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