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參數(shù)資料
| 型號(hào)： | S5933QE |
| 廠商： | APPLIEDMICRO INC |
| 元件分類： | 總線控制器 |
| 英文描述： | PCI BUS CONTROLLER, PQFP160 |
| 封裝： | PLASTIC, QFP-160 |
| 文件頁(yè)數(shù)： | 111/176頁(yè) |
| 文件大?。?/td> | 823K |
| 代理商： | S5933QE |
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3-12
ARCHITECTURAL OVERVIEW
S5933
PASS-THRU
Figure 5 depicts the Pass-Thru concept that allows
actual PCI bus transactions to be executed in real
time with the Add-On interface. The Pass-Thru feature
can be used to achieve high-performance burst trans-
fers between the PCI bus and Add-On bus external
peripherals or memory devices. In the Pass-Thru
mode, the S5933 provides the benefits of the con-
figuration registers and full PCI Bus Specification 2.1
compliance, while permitting customization and flex-
ibility in the implementation of the Add-On product.
The Pass-Thru logic is comprised of one address
register and two data registers (one for each direc-
tion). Control information necessary to define the
current (Pass-Thru) PCI bus transaction is also pro-
vided to the Add-On interface on dedicated S5933
package pins.
PCI AGENT
The S5933 was designed to serve as an “endpoint”
within a given PCI system. This means that it is the
final point in a data transfer (for example, a video
screen, network, sound output, or storage device)
and/or the beginning point of a data transfer (for ex-
ample, video source, network, audio source, or stor-
age device). Some PCI elements, termed “bridges,”
allow for data transactions to span to other bus stan-
dards and therefore are not “endpoints.”
As a PCI bus agent, the S5933 is required to support
the configuration registers in order to be compliant
with the PCI Specification. These configuration regis-
ters provide for a standardized method for system
platform software to integrate Add-On functions in a
machine. Another important aspect of the standard is
that all PCI bus agents can be controlled (enabled/
disabled, assigned physical address space, etc.) in a
common manner, regardless of function, by the host-
ing system. These configuration registers defined by
the PCI standard (and present within the S5933) are
described in the PCI Configuration Chapter.
Figure 5. Pass-Thru Concept
32
30
8
1
+1
(DURING BURSTS)
REGISTER
PCI
BUS
INTERFACE
PASS-THRU
DECODERS
+ CONTROL
PCI
ADDRESS
PCI
WRITE DATA
PASS THRU "ATTENTION"
PASS THRU COMPLETE "READY"
32
DATA
32
PCI
READ DATA
REGISTER
PASS-THRU
READ
DATA
PASS-THRU
WRITE
DATA
PASS-THRU
ADDRESS
REGISTER
COUNTER
CYCLE
IDENTIFICATION
INFORMATION
(BYTE ENABLES,
BURSTING,
WRITE VS READ
DECODE REGION)
ADD-ON
INTERFACE
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相關(guān)代理商/技術(shù)參數(shù) |
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| S5935 | 制造商:AMCC 制造商全稱:Applied Micro Circuits Corporation 功能描述:PCI Product |
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| S5935QRC | 制造商:AppliedMicro 功能描述:PCI Master Device 160-Pin PQFP |
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