參數(shù)資料
型號(hào)： PI7C8150ANDE
廠商： Pericom
文件頁(yè)數(shù)： 53/111頁(yè)
文件大?。?/td> 0K
描述： IC PCI-PCI BRIDGE 2PORT 256-PBGA
標(biāo)準(zhǔn)包裝： 90
系列： *
應(yīng)用： *
接口： *
電源電壓： *
封裝/外殼： 256-BGA
供應(yīng)商設(shè)備封裝： 256-PBGA（17x17）
包裝： 管件
安裝類(lèi)型： 表面貼裝
PI7C8150A
2-PORT PCI-TO-PCI BRIDGE
Page 46 of 111
APRIL 2006 – Revision 1.1
4.4
VGA SUPPORT
PI7C8150A provides two modes for VGA support:
VGA mode, supporting VGA-compatible addressing
VGA snoop mode, supporting VGA palette forwarding
4.4.1
VGA MODE
When a VGA-compatible device exists downstream from PI7C8150A, set the VGA mode
bit in the bridge control register in configuration space to enable VGA mode. When
PI7C8150A is operating in VGA mode, it forwards downstream those transactions
addressing the VGA frame buffer memory and VGA I/O registers, regardless of the values
of the base and limit address registers. PI7C8150A ignores transactions initiated on the
secondary interface addressing these locations.
The VGA frame buffer consists of the following memory address range:
000A 0000h–000B FFFFh
Read transactions to frame buffer memory are treated as non-prefetchable. PI7C8150A
requests only a single data transfer from the target, and read byte enable bits are forwarded
to the target bus.
The VGA I/O addresses are in the range of 3B0h–3BBh and 3C0h–3DFh I/O. These I/O
addresses are aliases every 1KB throughout the first 64KB of I/O space. This means that
address bits <15:10> are not decoded and can be any value, while address bits [31:16] must
be all 0’s. VGA BIOS addresses starting at C0000h are not decoded in VGA mode.
4.4.2
VGA SNOOP MODE
PI7C8150A provides VGA snoop mode, allowing for VGA palette write transactions to be
forwarded downstream. This mode is used when a graphics device downstream from
PI7C8150A needs to snoop or respond to VGA palette write transactions. To enable the
mode, set the VGA snoop bit in the command register in configuration space. Note that
PI7C8150A claims VGA palette write transactions by asserting DEVSEL_L in VGA snoop
mode.
When VGA snoop bit is set, PI7C8150A forwards downstream transactions within the
3C6h, 3C8h and 3C9h I/O addresses space. Note that these addresses are also forwarded as
part of the VGA compatibility mode previously described. Again, address bits <15:10> are
not decoded, while address bits <31:16> must be equal to 0, which means that these
addresses are aliases every 1KB throughout the first 64KB of I/O space.
Note: If both the VGA mode bit and the VGA snoop bit are set, PI7C8150A behaves in the
same way as if only the VGA mode bit were set.
06-0057
相關(guān)PDF資料
PDF描述
PI7C8150BNDIE IC PCI-PCI BRIDGE ASYNC 256-PBGA
PI7C8152BMAIE IC PCI-PCI BRIDGE 2PORT 160-MQFP
PI7C8154ANAE IC PCI-PCI BRIDGE ASYNC 304-PBGA
PI7C8154BNAIE IC PCI-PCI BRIDGE ASYNC 304-PBGA
PI7C9X110BNBE IC PCIE TO PCI REV BRG 160LFBGA
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PI7C8150B 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:PCI Bridge | Asynchronous 2-Port PCI Bridge
PI7C8150B-33 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:PCI Bridge | Asynchronous 2-Port PCI Bridge
PI7C8150BEVB 功能描述:界面開(kāi)發(fā)工具 2 Port PCI Bridge Eval Brd RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類(lèi)型:RS-485 工具用于評(píng)估:ADM3485E 接口類(lèi)型:RS-485 工作電源電壓:3.3 V
PI7C8150BMA 制造商:PERICOM 制造商全稱(chēng):Pericom Semiconductor Corporation 功能描述:ASYNCHRONOUS 2-PORT PCI-TO-PCI BRIDGE
PI7C8150BMA-33 制造商:PERICOM 制造商全稱(chēng):Pericom Semiconductor Corporation 功能描述:ASYNCHRONOUS 2-PORT PCI-TO-PCI BRIDGE
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*