参数资料
型号: PI7C7300DNAE
厂商: Pericom
文件页数: 89/107页
文件大小: 0K
描述: IC PCI-PCI BRIDGE 3PORT 272-BGA
标准包装: 40
系列: *
应用: *
接口: *
电源电压: *
封装/外壳: 272-BBGA
供应商设备封装: 272-PBGA(27x27)
包装: 管件
安装类型: 表面贴装
PI7C7300D
3-PORT PCI-TO-PCI BRIDGE
Page 82 of 107
Pericom Semiconductor
November 2005 - Revision 1.01
14.1.19
PREFETCHABLE MEMORY BASE REGISTER – OFFSET 24h
Bit
Function
Type
Description
3:0
64-bit addressing
R/O
Indicates 64-bit addressing
0000: 32-bit addressing
0001: 64-bit addressing
Reset to 1
15:4
Prefetchable
Memory Base
Address [31:20]
R/W
Defines the bottom address of an address range for the bridge to
determine when to forward memory read and write transactions from
one interface to the other. The upper 12 bits correspond to address
bits [31:20] and are writable. The lower 20 bits are assumed to be 0.
14.1.20
PREFETCHABLE MEMORY LIMIT REGISTER – OFFSET 24h
Bit
Function
Type
Description
19:16
64-bit addressing
R/O
Indicates 64-bit addressing
0000: 32-bit addressing
0001: 64-bit addressing
Reset to 1
31:20
Prefetchable
Memory Base
Address [31:20]
R/W
Defines the top address of an address range for the bridge to
determine when to forward memory read and write transactions from
one interface to the other. The upper 12 bits correspond to address
bits [31:20] and are writable. The lower 20 bits are assumed to be
FFFFFh.
14.1.21
PREFETCHABLE MEMORY BASE ADDRESS UPPER 32-BITS
REGISTER – OFFSET 28h
Bit
Function
Type
Description
31:0
Prefetchable
Memory Base
Address, Upper
32-bits [63:32]
R/W
Defines the upper 32-bits of a 64-bit bottom address of an address
range for the bridge to determine when to forward memory read and
write transactions from one interface to the other.
Reset to 0
14.1.22
PREFETCHABLE MEMORY LIMIT ADDRESS UPPER 32-BITS
REGISTER – OFFSET 2Ch
Bit
Function
Type
Description
31:0
Prefetchable
Memory Limit
Address, Upper
32-bits [63:32]
R/W
Defines the upper 32-bits of a 64-bit top address of an address range
for the bridge to determine when to forward memory read and write
transactions from one interface to the other.
Reset to 0
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