參數(shù)資料
| 型號： | PI7C7300ANAE |
| 廠商： | Pericom |
| 文件頁數(shù)： | 54/109頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC PCI-PCI BRIDGE 3PORT 272-BGA |
| 產品變化通告： | Product Discontinuation 09/Dec/2010 |
| 標準包裝： | 40 |
| 系列： | * |
| 應用： | * |
| 接口： | * |
| 電源電壓： | * |
| 封裝/外殼： | 272-BBGA |
| 供應商設備封裝： | 272-PBGA（27x27） |
| 包裝： | 管件 |
| 安裝類型： | 表面貼裝 |
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PI7C7300A
3-PORT PCI-TO-PCI BRIDGE
ADVANCE INFORMATION
Page 49 OF 109
09/25/03 Revision 1.09
same direction. Note that delayed completion transactions cross PI7C7300A in the
direction opposite that of the corresponding delayed requests.
1. Posted write transactions must complete on the target bus in the order in which they
were received on the initiator bus. The subsequent posted write transaction can be
setting a flag that covers the data in the first posted write transaction; if the second
transaction were to complete before the first transaction, a device checking the flag
could subsequently consume stale data.
2. A delayed read request traveling in the same direction as a previously queued posted
write transaction must push the posted write data ahead of it. The posted write
transaction must complete on the target bus before the delayed read request can be
attempted on the target bus. The read transaction can be to the same location as the
write data, so if the read transaction were to pass the write transaction, it would
return stale data.
3. A delayed read completion must ‘‘pull’’ ahead of previously queued posted write
data traveling in the same direction. In this case, the read data is traveling in the
same direction as the write data, and the initiator of the read transaction is on the
same side of PI7C7300A as the target of the write transaction. The posted write
transaction must complete to the target before the read data is returned to the
initiator. The read transaction can be a reading to a status register of the initiator of
the posted write data and therefore should not complete until the write transaction is
complete.
4. Delayed write requests cannot pass previously queued posted write data. For posted
memory write transactions, the delayed write transaction can set a flag that covers
the data in the posted write transaction. If the delayed write request were to complete
before the earlier posted write transaction, a device checking the flag could
subsequently consume stale data.
5. Posted write transactions must be given opportunities to pass delayed read and write
requests and completions. Otherwise, deadlocks may occur when some bridges
which support delayed transactions and other bridges which do not support delayed
transactions are being used in the same system. A fairness algorithm is used to
arbitrate between the posted write queue and the delayed transaction queue.
6.4
DATA SYNCHRONIZATION
Data synchronization refers to the relationship between interrupt signaling and data
delivery. The PCI Local Bus Specification, Revision 2.2, provides the following
alternative methods for synchronizing data and interrupts:
!
The device signaling the interrupt performs a read of the data just written (software).
!
The device driver performs a read operation to any register in the interrupting device
before accessing data written by the device (software).
相關PDF資料 |
PDF描述 |
|---|---|
| PI7C7300DNAE | IC PCI-PCI BRIDGE 3PORT 272-BGA |
| PI7C8140AMAE | IC PCI-PCI BRIDGE 2PORT 128-QFP |
| PI7C8150ANDE | IC PCI-PCI BRIDGE 2PORT 256-PBGA |
| PI7C8150BNDIE | IC PCI-PCI BRIDGE ASYNC 256-PBGA |
| PI7C8152BMAIE | IC PCI-PCI BRIDGE 2PORT 160-MQFP |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 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:外圍驅動器與原件 - 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 產品:Evaluation Boards 類型:RS-485 工具用于評估: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 |
| PI7C8140AEVB | 功能描述:界面開發(fā)工具 2 Port PCI to PCI Bridge Eval Brd RoHS:否 制造商:Bourns 產品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
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