Advance Information Page 88 of 114 DEC 2009 REVISION 1.02 Bit Function Type Description 4 Memor" />
參數(shù)資料
型號： PI7C8154ANAE
廠商： Pericom
文件頁數(shù)： 102/114頁
文件大?。?/td> 0K
描述： IC PCI-PCI BRIDGE ASYNC 304-PBGA
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
PI7C8154A
ASYNCHRONOUS 2-PORT
PCI-to-PCI BRIDGE
Advance Information
Page 88 of 114
DEC 2009 REVISION 1.02
Bit
Function
Type
Description
4
Memory Read
Underflow
Control
R/W
0: Bridge will start returning memory read data to the source bus after the
2nd data is in the data buffer. If the data buffer is read as empty
(underflow), bridge will insert target wait states (up to 7 wait states) on
the source bus and prefetch more data in the data buffer. If there is no
further data coming into the data buffer and the number of wait states
reaches 7, the bridge will assert STOP# to disconnect the master and
terminate the transaction.
1: Bridge will not start returning memory read data to the source bus until
1 cache line of data is accumulated in the data buffer. If the data buffer is
read as empty (underflow), the bridge will stop prefetching at the
destination bus and signal a disconnect to the external master on the
source bus. The transaction entry and the associated data will be
discarded.
Reset to 0
15:5
Reserved
R/O
Returns 0 when read. Reset to 0.
14.1.33
UPSTREAM MEMORY CONTROL REGISTER – OFFSET 48h
Bit
Function
Type
Description
16
Upstream (S to
P) Memory Base
and Limit Enable
R/W
0: Upstream memory range is the entire range except the downstream
memory channel
1: Upstream memory range is confined to the upstream Memory Base and
Limit
*see Offset 58h, 5Ch, and 60h for upstream memory range
31:17
Reserved
R/O
Returns 0 when read. Reset to 0.
14.1.34
SECONDARY BUS ARBITER PREEMPTION CONTROL REGISTER –
OFFSET 4Ch
Bit
Function
Type
Description
31:28
Secondary bus
arbiter
preemption
contorl
R/W
Controls the number of clock cycles after frame is asserted before
preemption is enabled.
1xxx: Preemption off
0000: Preemption enabled after 0 clock cycles after FRAME asserted
0001: Preemption enabled after 1 clock cycle after FRAME asserted
0010: Preemption enabled after 2 clock cycles after FRAME asserted
0011: Preemption enabled after 4 clock cycles after FRAME asserted
0100: Preemption enabled after 8 clock cycles after FRAME asserted
0101: Preemption enabled after 16 clock cycles after FRAME asserted
0110: Preemption enabled after 32 clock cycles after FRAME asserted
0111: Preemption enabled after 64 clock cycles after FRAME asserted
14.1.35
HOT SWAP SWITCH TIME SLOT REGISTER – OFFSET 4Ch
Bit
Function
Type
Description
27:0
Hot Swap Switch
Time Slot
Register
R/W
Hot Swap switch time slot set to 0003A98h (15K PCI clocks).
Reset to 0003A98h.
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參數(shù)描述
PI7C8154ANAE-33 功能描述:外圍驅(qū)動器與原件 - PCI 64B/66MHz 2 Port PCI Bridge 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
PI7C8154B 制造商:PERICOM 制造商全稱:Pericom Semiconductor Corporation 功能描述:2 PORT 64 BIT 66MHZ PCI TO PCI BRIDGE
PI7C8154BNA 制造商:Pericom Semiconductor Corporation 功能描述:
PI7C8154BNAE 功能描述:外圍驅(qū)動器與原件 - PCI 64B/66MHz 2 Port PCI Bridge 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
PI7C8154BNAE-80 功能描述:外圍驅(qū)動器與原件 - PCI 64B/66MHz 2 Port PCI Bridge 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
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