參數(shù)資料
型號(hào)： PI7C8150ANDE
廠商： Pericom
文件頁(yè)數(shù)： 98/111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
安裝類型： 表面貼裝
PI7C8150A
2-PORT PCI-TO-PCI BRIDGE
Page 87 of 111
APRIL 2006 – Revision 1.1
Bit
Function
Type
Description
25
Secondary
Master Timeout
R/W
Set’s the maximum number of PCI clocks the bridge will wait for an
initiator on the secondary to repeat a delayed transaction request. The
counter starts right after the delayed transaction is at the front of the
queue. If the master has not repeated at least once before the counter
expires, the bridge discards the transaction from the queue.
0: 2
15
PCI clocks
1: 2
10
PCI clocks
Reset to 0
26
Master Timeout
Status
R/WC
This bit is set to 1 when either the primary master timeout counter or
secondary master timeout counter expires.
Reset to 0
27
Discard Timer
P_SERR_L
enable
R/W
This bit is set to 1 and P_SERR_L is asserted when either the
primary discard timer or the secondary discard timer expire.
Reset to 0
31-28
Reserved
R/O
Reserved. Returns 0 when read. Reset to 0.
14.1.29
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: The bridge prefetches and does not forward byte enable bits during
upstream memory reads.
1: The 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 hardware 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 mode, this bit enables GPIO[3] to mask
I/O enable, memory enable and master enable bits to 0. PI7C8150A
will stop accepting I/O and memory transactions as a result.
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: PI7C8150A is ready for operation
1: Causes PI7C8150A to perform a chip reset
06-0057
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