參數(shù)資料
型號(hào)： PI7C7300ANA
廠商： Pericom Semiconductor Corp.
英文描述： 3-PORT PCI-to-PCI BRIDGE
中文描述： 3端口PCI至PCI橋
文件頁(yè)數(shù)： 33/109頁(yè)
文件大小： 779K
代理商： PI7C7300ANA
PI7C7300A
3-PORT PCI-TO-PCI BRIDGE
ADVANCE INFORMATION
Page 33 OF 109
09/25/03 Revision 1.09
When PI7C7300A detects a Type 1 configuration transaction intended for a PCI bus
downstream from the secondary bus, PI7C7300A forwards the transaction unchanged to
the secondary bus. Ultimately, this transaction is translated to a Type 0 configuration
command or to a special cycle transaction by a downstream PCI-to-PCI bridge.
Downstream Type 1 to Type 1 forwarding occurs when the following conditions are met
during the address phase:
!
The lowest two address bits are equal to 01b.
!
The bus number falls in the range defined by the lower limit (exclusive) in the
secondary bus number register and the upper limit (inclusive) in the subordinate bus
number register.
!
PI7C7300A also supports Type 1 to Type 1 forwarding of configuration write
transactions upstream to support upstream special cycle generation. A Type 1
configuration command is forwarded upstream when the following conditions are met:
!
The lowest two address bits are equal to 01b.
!
The bus number falls outside the range defined by the lower limit (inclusive)
in the secondary bus number register and the upper limit (inclusive) in the
subordinate bus number register.
!
The device number in address bits AD[15:11] is equal to 11111b.
!
The function number in address bits AD[10:8] is equal to 111b.
!
The bus command is a configuration write transaction.
The bus command is a configuration read or write transaction.
The PI7C7300A forwards Type 1 to Type 1 configuration write transactions as delayed
transactions. Type 1 to Type 1 configuration write transactions are limited to a single
data transfer.
4.8.4
SPECIAL CYCLES
The Type 1 configuration mechanism is used to generate special cycle transactions in
hierarchical PCI systems. Special cycle transactions are ignored by acting as a target and
are not forwarded across the bridge. Special cycle transactions can be generated from
Type 1 configuration write transactions in either the upstream or the down-stream
direction.
PI7C7300A initiates a special cycle on the target bus when a Type 1 configuration write
transaction is being detected on the initiating bus and the following conditions are met
during the address phase:
!
The lowest two address bits on AD[1:0] are equal to 01b.
!
The device number in address bits AD[15:11] is equal to 11111b.
!
The function number in address bits AD[10:8] is equal to 111b.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PI7C7300ANAE 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI 3 Port PCI Bridge RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
PI7C7300ANA-E 制造商:Pericom Semiconductor Corporation 功能描述:PCI-to-PCI Bridge 272-Pin BGA 制造商:Pericom Semiconductor Corporation 功能描述:PCI to PCI Bridge 272-Pin BGA
PI7C7300DNAE 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI PCI -to -PCI Bridge 3 Port RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
PI7C7300EVB 功能描述:界面開發(fā)工具 3 Port PCI Bridge Eval Brd RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評(píng)估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V
PI7C8140A 制造商:PERICOM 制造商全稱:Pericom Semiconductor Corporation 功能描述:2 PORT PCI TO PCI BRIDGE PLX PCI 6140 COMPARISON
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