參數(shù)資料
型號： PI7C8140AMAE
廠商： Pericom
文件頁數(shù)： 51/82頁
文件大小： 0K
描述： IC PCI-PCI BRIDGE 2PORT 128-QFP
標(biāo)準(zhǔn)包裝： 39
系列： *
應(yīng)用： *
接口： *
電源電壓： *
封裝/外殼： 128-BFQFP
供應(yīng)商設(shè)備封裝： 128-QFP（14x20）
包裝： 管件
安裝類型： 表面貼裝
PI7C8140A
2-PORT PCI-TO-PCI BRIDGE
Page 55 of 82
March 20, 2007 – Revision 1.01
11.1 PRIMARY INTERFACE
P_CBE [3:0]
Command
Action
0000
Interrupt
Acknowledge
Ignore
0001
Special Cycle
Do not claim. Ignore.
0010
I/O Read
1. If address is within pass through I/O range, claim and pass through.
2. Otherwise, do not pass through and do not claim for internal access.
0011
I/O Write
Same as I/O Read.
0100
Reserved
-----
0101
Reserved
-----
0110
Memory Read
1. If address is within pass through memory range, claim and pass
through.
2. If address is within pass through memory mapped I/O range, claim and
pass through.
3. Otherwise, do not pass through and do not claim for internal access.
0111
Memory Write
Same as Memory Read.
1000
Reserved
-----
1001
Reserved
-----
1010
Configuration Read
Type 0 Configuration Read:
If the bridge’s IDSEL line is asserted, perform function decode and claim
if target function is implemented. Otherwise, ignore. If claimed, permit
access to target function’s configuration registers. Do not pass through
under any circumstances.
Type 1 Configuration Read:
1. If the target bus is the bridge’s secondary bus: claim and pass through
as a Type 0 Configuration Read.
2. If the target bus is a subordinate bus that exists behind the bridge (but
not equal to the secondary bus): claim and pass through as a Type 1
Configuration Read.
3. Otherwise, ignore.
1011
Configuration Write
Type 0 Configuration Write: same as Configuration Read.
Type 1 Configuration Write (not special cycle request):
1. If the target bus is the bridge’s secondary bus: claim and pass through
as a Type 0 Configuration Write
2. If the target bus is a subordinate bus that exists behind the bridge (but
not equal to the secondary bus): claim and pass through unchanged as a
Type 1 Configuration Write.
3. Otherwise, ignore.
Configuration Write as Special Cycle Request
(device = 1Fh, function = 7h)
1. If the target bus is the bridges secondary bus: claim and pass through
as a special cycle.
2. If the target bus is a subordinate bus that exists behind the bridge (but
not equal to the secondary bus): claim and pass through unchanged as a
type 1 Configuration Write.
3. Otherwise ignore
1100
Memory Read
Multiple
Same as Memory Read
1101
Dual Address Cycle
Supported
07-0067
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