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| 型號： | PI7C8154BNAIE |
| 廠商： | Pericom |
| 文件頁數(shù)： | 100/114頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC PCI-PCI BRIDGE ASYNC 304-PBGA |
| 產(chǎn)品變化通告： | Product Discontinuation Notice 22/Jan/2010 |
| 標(biāo)準(zhǔn)包裝： | 27 |
| 系列： | * |
| 應(yīng)用： | * |
| 接口： | * |
| 電源電壓： | * |
| 封裝/外殼： | 304-BBGA |
| 供應(yīng)商設(shè)備封裝： | 304-PBGA（31x31） |
| 包裝： | 管件 |
| 安裝類型： | 表面貼裝 |
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PI7C8154B
ASYNCHRONOUS 2-PORT
PCI-to-PCI BRIDGE
Advance Information
Page 86 of 114
JUNE 2008 REVISION 1.1
Bit
Function
Type
Description
31-28
Reserved
R/O
Reserved. Returns 0 when read. Reset to 0.
14.1.30
DIAGNOSTIC / CHIP CONTROL REGISTER – OFFSET 40h
Bit
Function
Type
Description
0
Reserved
R/O
Reserved. Returns 0 when read. Reset to 0
1
Memory Write
Disconnect
Control
R/W
Controls when the bridge (as a target) disconnects memory write
transactions.
0: memory write disconnects at 4KB aligned address boundary
1: memory write disconnects at cache line aligned address boundary
Reset to 0
3:2
Reserved
R/O
Reserved. Returns 0 when read. Reset to 0.
4
Secondary Bus
Prefetch Disable
R/W
Controls the bridge’s ability to prefetch during upstream memory read
transactions
0: Bridge prefetches and does not forward byte enable bits during
upstream memory read transactions.
1: Bridge requests only 1 DWORD from the target and forwards read
byte enable bits during upstream memory reads.
Reset to 0
5
Live Insertion
Mode
R/W
Enables control of transaction forwarding
0: GPIO[3] has no effect on the I/O, memory, and master enable bits
1: If GPIO[3] is set to input only, this bit enables GPIO[3] to mask the
I/O enable, memory enable, and master enable bits to 0. These bits are
masked when GPIO[3] is driven HIGH. As a result, PI7C8154 stops
accepting I/O and memory transactions.
Reset to 0
7:6
Reserved
R/O
Reserved. Returns 0 when read. Reset to 0
8
Chip Reset
R/WR
Controls the chip and secondary bus reset.
0: Bridge is ready for operation
1: Causes Bridge to perform a chip reset
15:9
Reserved
R/O
Reserved. Returns 0 when read. Reset to 0.
14.1.31
ARBITER CONTROL REGISTER – OFFSET 40h
Bit
Function
Type
Description
24:16
Arbiter Control
R/W
Each bit controls whether a secondary bus master is assigned to the high
priority group or the low priority group.
Bits [24:16] correspond to request inputs S_REQ[8:0]
0: low priority
1: high priority
Reset to 0
25
Priority of
Secondary
Interface
R/W
Controls whether the secondary interface of the bridge is in the high
priority group or the low priority group.
0: low priority
1: high priority
Reset to 1
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