參數(shù)資料
| 型號： | PI7C8154ANAE |
| 廠商： | Pericom |
| 文件頁數(shù)： | 62/114頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC PCI-PCI BRIDGE ASYNC 304-PBGA |
| 標準包裝： | 27 |
| 系列： | * |
| 應用： | * |
| 接口： | * |
| 電源電壓： | * |
| 封裝/外殼： | 304-BBGA |
| 供應商設備封裝： | 304-PBGA（31x31） |
| 包裝： | 管件 |
| 安裝類型： | 表面貼裝 |
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PI7C8154A
ASYNCHRONOUS 2-PORT
PCI-to-PCI BRIDGE
Advance Information
Page 51 of 114
DEC 2009 REVISION 1.02
the original delayed read request; that is, a delayed read completion transaction proceeds from the
target bus to the initiator bus.
PI7C8154A does not combine or merge write transactions:
PI7C8154A does not combine separate write transactions into a single write transaction—this
optimization is best implemented in the originating master.
PI7C8154A does not merge bytes on separate masked write transactions to the same DWORD
address—this optimization is also best implemented in the originating master.
PI7C8154A does not collapse sequential write transactions to the same address into a single
write transaction - the PCI Local Bus Specification does not permit this combining of
transactions.
4.2
GENERAL ORDERING GUIDELINES
Independent transactions on primary and secondary buses have a relationship only when those
transactions cross PI7C8154A.
The following general ordering guidelines govern transactions crossing PI7C8154A:
The ordering relationship of a transaction with respect to other transactions is determined when
the transaction completes, that is, when a transaction ends with a termination other than target
retry.
Requests terminated with target retry can be accepted and completed in any order with respect
to other transactions that have been terminated with target retry. If the order of completion of
delayed requests is important, the initiator should not start a second delayed transaction until
the first one has been completed. If more than one delayed transaction is initiated, the initiator
should repeat all delayed transaction requests, using some fairness algorithm. Repeating a
delayed transaction cannot be contingent on completion of another delayed transaction.
Otherwise, a deadlock can occur.
Write transactions flowing in one direction have no ordering requirements with respect to write
transactions flowing in the other direction. PI7C8154A can accept posted write transactions on
both interfaces at the same time, as well as initiate posted write transactions on both interfaces
at the same time.
The acceptance of a posted memory write transaction as a target can never be contingent on the
completion of a non-locked, non-posted transaction as a master. This is true for PI7C8154A
and must also be true for other bus agents. Otherwise, a deadlock can occur.
PI7C8154A accepts posted write transactions, regardless of the state of completion of any
delayed transactions being forwarded across PI7C8154A.
4.3
ORDERING RULES
Table 4-1 shows the ordering relationships of all the transactions and refers by number to the
ordering rules that follow.
Table 4-1 SUMMARY OF TRANSACTION ORDERING
Pass
Posted
Write
Delayed Read
Request
Delayed Write
Request
Delayed Read
Completion
Delayed Write
Completion
Posted Write
No1
Yes5
Delayed Read Request
No2
No
Yes
相關PDF資料 |
PDF描述 |
|---|---|
| PI7C8154BNAIE | IC PCI-PCI BRIDGE ASYNC 304-PBGA |
| PI7C9X110BNBE | IC PCIE TO PCI REV BRG 160LFBGA |
| PI7C9X130DNDE | IC PCIE-PCIX BRIDGE 1PORT 256BGA |
| PI7C9X20303SLCFDE | IC PCIE PACKET SWITCH 128LQFP |
| PI7C9X20303ULAZPE | IC PCIE PACKET SWITCH 132TQFN |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| PI7C8154ANAE-33 | 功能描述:外圍驅動器與原件 - PCI 64B/66MHz 2 Port PCI Bridge RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| PI7C8154B | 制造商:PERICOM 制造商全稱:Pericom Semiconductor Corporation 功能描述:2 PORT 64 BIT 66MHZ PCI TO PCI BRIDGE |
| PI7C8154BNA | 制造商:Pericom Semiconductor Corporation 功能描述: |
| PI7C8154BNAE | 功能描述:外圍驅動器與原件 - PCI 64B/66MHz 2 Port PCI Bridge RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
| PI7C8154BNAE-80 | 功能描述:外圍驅動器與原件 - PCI 64B/66MHz 2 Port PCI Bridge RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
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