參數(shù)資料
型號: PI7C7300NA
廠商: PERICOM SEMICONDUCTOR CORP
元件分類: 總線控制器
英文描述: PCI BUS CONTROLLER, PBGA272
封裝: PLASTIC, BGA-272
文件頁數(shù): 102/119頁
文件大?。?/td> 880K
代理商: PI7C7300NA
PI7C7300
3-PORT PCI-to-PCI BRIDGE
Advanced Information
73
06/04/02 Revision 1.07
14.1.27
Diagnostic / Chip Control Register – Offset 40h (continued)
Configuration 2 (continued)
Bit
Function
Type
Description
4
Memory Read
Flow-through
Control
R/W
Controls whether the bridge supports memory read flow-
through
0: Enable
1: Disable
Reset to 0
8:5
Reserved
R/O
Reserved. Returns 0 when read. Reset to 0
10:9
Test Mode For
All Counters at
S2
R/O
Controls the testability of the bridge’s internal counters.
The bits are used for chip test only.
00: all bits are exercised
01: byte 1 is exercised
10: byte 2 is exercised
11: byte 3 is exercised
Reset to 0
15:11
Reserved
R/O
Reserved. Returns 0 when read. Reset to 0.
14.1.28
Arbiter Control Register – Offset 40h
Bit
Function
Type
Description
23:16
Arbiter Control
R/W
Each bit controls whether a secondary bus master is assigned
to the high priority group or the low priority group.
Bits [23:16] correspond to request inputs S1_REQ[7:0] or
S2_REQ[6:0]
0: low priority
1: high priority
Reset to 0
24
Reserved
R/O
Reserved. Returns 0 when read. Reset to 0
25
Priority of
Secondary
Interface
R/W
Controls whether the S1 or S2 interface of the bridge is in the
high priority group or the low priority group.
0: low priority
1: high priority
Reset to 1
26
Arbiter Park
Function
R/W
Controls the arbiter’s park function.
0: park to last master
1: park to bridge port S1 or S2
Reset to 0
31:27
Reserved
R/O
Reserved. Returns 0 when read. Reset to 0.
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