參數(shù)資料
型號： PI7C21P100
廠商： Pericom Semiconductor Corp.
英文描述： 2-PORT PCI-X BRIDGE
中文描述： 2端口PCI - X橋接
文件頁數(shù)： 31/77頁
文件大?。?/td> 603K
代理商： PI7C21P100
PI7C21P100
2-PORT PCI-X BRIDGE
ADVANCE INFORMATION
Page 31 of 77
June 10, 2005 Revision 1.06
The bus number in address field P_AD[23:16] is equal to the value in the secondary bus
number register in configuration space.
P_CBE[3:0]# is a configuration read or configuration write transaction.
When PI7C21P100 translates the Type 1 transaction to a Type 0 transaction on the secondary
interface, it performs the following translations to the address:
Sets the lowest two address bits on S_AD[1:0] to 00.
Decodes the device number and drives the bit pattern specified in Table 4-4 on
S_AD[31:16] for the purpose of asserting the device’s IDSEL signal.
Sets S_AD[15:11] to 0 if the secondary bus is operating in conventional PCI mode
(device number is passed through unchanged in PCI-X mode)
Leaves unchanged the function number and register number fields.
PI7C21P100 asserts a unique address line based on the device number. These address lines
may be used as secondary bus IDSEL signals. The mapping of the address lines depends on
the device number in the address bits P_AD[15:11] for Type 1 transactions. Table 4-4
presents the mapping that PI7C21P100 uses.
Table 4-4 DEVICE NUMBER TO IDSEL
Device Number
0h
1h
2h
3h
4h
5h
6h
7h
8h
9h
Ah
Bh
Ch
Dh
Eh
Fh
10h – 1Eh
P_AD[15:11]
00000
00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
01011
01100
01101
01110
01111
10000 – 11110
Secondary IDSEL S_AD[31:16]
0000 0000 0000 0001
0000 0000 0000 0010
0000 0000 0000 0100
0000 0000 0000 1000
0000 0000 0001 0000
0000 0000 0010 0000
0000 0000 0100 0000
0000 0000 1000 0000
0000 0001 0000 0000
0000 0010 0000 0000
0000 0100 0000 0000
0000 1000 0000 0000
0001 0000 0000 0000
0010 0000 0000 0000
0100 0000 0000 0000
1000 0000 0000 0000
0000 0000 0000 0000
0000 0000 0000 0000
or, may convert to a special cycle transaction described
in section 4.4.4
1Fh
11111
PI7C21P100 forwards Type 1 to Type 0 configuration read or write transactions as delayed
transactions in PCI mode or as split transactions in PCI-X mode.
4.4.3
TYPE 1 TO TYPE 1 FORWARDING
Type 1 to Type 1 transaction forwarding provides a hierarchical configuration mechanism
when two or more levels of PCI-to-PCI bridges are used.
When PI7C21P100 detects a Type 1 configuration transaction intended for a PCI/PCI-X bus
downstream from the secondary interface, PI7C21P100 forwards the transaction unchanged to
the secondary interface. Ultimately, this transaction is translated to a Type 0 configuration
command or to a special cycle transaction by a downstream PCI bridge. Downstream Type 1
to Type 1 forwarding occurs when the following conditions are met during the address phase:
相關(guān)PDF資料
PDF描述
PI7C21P100NH 2-PORT PCI-X BRIDGE
PI7C7100BNA PCI Bus Interface/Controller
PI7C7100 3-Port PCI Bridge
PI7C7100CNA 3-Port PCI Bridge
PI7C7300 3-PORT PCI-to-PCI BRIDGE
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PI7C21P100B 制造商:PERICOM 制造商全稱:Pericom Semiconductor Corporation 功能描述:2-PORT PCI-X TO PCI-X BRIDGE
PI7C21P100BEVB 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 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V
PI7C21P100BNH 制造商:PERICOM 制造商全稱:Pericom Semiconductor Corporation 功能描述:2-PORT PCI-X TO PCI-X BRIDGE
PI7C21P100BNHE 功能描述:外圍驅(qū)動器與原件 - PCI PCI-X to PCI-XBridge 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
PI7C21P100EVB 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 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V
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