- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄190059 > PI7C7300NA (PERICOM SEMICONDUCTOR CORP) PCI BUS CONTROLLER, PBGA272 PDF資料下載
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)： | 37/119頁 |
| 文件大?。?/td> | 880K |
| 代理商： | PI7C7300NA |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁當(dāng)前第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁
PI7C7300
3-PORT PCI-to-PCI BRIDGE
Advanced Information
14
06/04/02 Revision 1.07
TABLE 4-2. WRITE TRANSACTION FORWARDING
Type of Transaction
Type of Forwarding
Memory Write
Posted (except VGA memory)
Memory Write and Invalidate
Posted
Memory Write to VGA memory
Delayed
I/O Write
Delayed
Type 1 Configuration Write
Delayed
4.6.1
Memory Write Transactions
Posted write forwarding is used for “Memory Write” and “Memory Write and Invalidate”
transactions.
When PI7C7300 determines that a memory write transaction is to be forwarded across
the bridge, PI7C7300 asserts DEVSEL# with medium timing and TRDY#
in the next cycle, provided that enough buffer space is available in the posted memory
write queue for the address and at least one DWORD of data. Under
this condition, PI7C7300 accepts write data without obtaining access to the target bus.
The PI7C7300 can accept one DWORD of write data every PCI clock cycle.
That is, no target wait state is inserted. The write data is stored in an internal
posted write buffers and is subsequently delivered to the target.
The PI7C7300 continues to accept write data until one of the following events occurs:
§
The initiator terminates the transaction by de-asserting FRAME# and IRDY#.
§
An internal write address boundary is reached, such as a cache line boundary or
an aligned 4KB boundary, depending on the transaction type.
§
The posted write data buffer fills up.
When one of the last two events occurs, the PI7C7300 returns a target disconnect to
the requesting initiator on this data phase to terminate the transaction.
Once the posted write data moves to the head of the posted data queue, PI7C7300
asserts its request on the target bus. This can occur while PI7C7300 is still receiving
data on the initiator bus. When the grant for the target bus is received and the target
bus is detected in the idle condition, PI7C7300 asserts FRAME# and drives the stored
write address out on the target bus. On the following cycle, PI7C7300 drives the first
DWORD of write data and continues to transfer write data until all write data
corresponding to that transaction is delivered, or until a target termination is received.
As long as write data exists in the queue, PI7C7300 can drive one DWORD of write
data each PCI clock cycle; that is, no master wait states are inserted. If write data is
flowing through PI7C7300 and the initiator stalls, PI7C7300 will signal the last data
phase for the current transaction at the target bus if the queue empties. PI7C7300 will
restart the follow-on transactions if the queue has new data.
PI7C7300 ends the transaction on the target bus when one of the following conditions
is met:
§
All posted write data has been delivered to the target.
§
The target returns a target disconnect or target retry (PI7C7300 starts another
transaction to deliver the rest of the write data).
§
The target returns a target abort (PI7C7300 discards remaining write data).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PIC-PROJ2 | SOT-23, Rail-to-Rail Output, Picoamp Input Current Precision Op Amp; Package: SOT; No of Pins: 5; Temperature Range: 0°C to +70°C |
| PIC-TDB | PIC TUTOR/DEV BOARD |
| PIC16C505-20/P | 8-BIT, OTPROM, 20 MHz, RISC MICROCONTROLLER, PDIP14 |
| PIC16C54CT-04I/SO | 8-BIT, OTPROM, 4 MHz, RISC MICROCONTROLLER, PDSO18 |
| PIC16C56A-20I/JW | 8-BIT, UVPROM, 20 MHz, RISC MICROCONTROLLER, CDIP18 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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(chǎn)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 |
| PI7C8140AMA | 制造商:PERICOM 制造商全稱:Pericom Semiconductor Corporation 功能描述:2-Port PCI-to-PCI Bridge |
| PI7C8140AMAE | 功能描述:外圍驅(qū)動器與原件 - PCI PCI -to -PCI Bridge 2 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 |
| PI7C8148A | 制造商:PERICOM 制造商全稱:Pericom Semiconductor Corporation 功能描述:2-PORT PCI-TO-PCI BRIDGE ADVANCE INFORMATION |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。