參數(shù)資料
型號(hào): PI7C7300A
廠商: Pericom Semiconductor Corp.
英文描述: 3-PORT PCI-to-PCI BRIDGE
中文描述: 3端口PCI至PCI橋
文件頁(yè)數(shù): 84/109頁(yè)
文件大小: 779K
代理商: PI7C7300A
PI7C7300A
3-PORT PCI-TO-PCI BRIDGE
ADVANCE INFORMATION
Page 84 OF 109
09/25/03 Revision 1.09
Bit
Function
Type
Description
Sets the number of clocks for time-to-preempt after another master
request.
000: 32 clocks
001: 8 clocks
010: 16 clocks
011: 64 clocks
100: 128 clocks
Reset to 000
Sets preemption.
0: preemption ON
1: preemption OFF
Reset to 0
30:28
Secondary Bus
Master
Preemption
Control
R/W
31
Preemption
R/W
14.1.31
UPSTREAM (S1 or S2 to P) MEMORY BASE REGISTER –
OFFSET 50h
Bit
Function
Type
Description
0: 32 bit addressing
1: 64 bit addressing
Reset to 1
Controls upstream memory base address.
Reset to 00000000h
3:0
64 bit addressing
R/O
15:4
Upstream
Memory Base
Address
R/W
14.1.32
UPSTREAM (S1 or S2 to P) MEMORY LIMIT REGISTER –
OFFSET 50h
Bit
Function
Type
Description
0: 32 bit addressing
1: 64 bit addressing
Reset to 1
Controls upstream memory limit address.
Reset to 000FFFFFh
19:16
64 bit addressing
R/O
31:20
Upstream
Memory Limit
Address
R/W
14.1.33
UPSTREAM (S1 or S2 to P) MEMORY BASE UPPER 32-BITS
REGISTER – OFFSET 54h
Bit
Function
Upstream
Memory Base
Address
Type
Description
Defines bits [63:32] of the upstream memory base
Reset to 0
31:0
R/W
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