參數(shù)資料
型號： PLI9080
廠商： Electronic Theatre Controls, Inc.
英文描述： PCI I/O ACCELERATOR
中文描述： 的PCI I / O加速器
文件頁數(shù)： 10/133頁
文件大小： 883K
代理商： PLI9080
SECTION 1
PCI 9080
GENERAL DESCRIPTION
PLX Technology, Inc., 1997
Page 2
Version 0.93
PCI Bus
Interface
&
Arbiter
PCI Bus
State
Machines
PCI Config.
Internal
Registers
Local Config.
DMA
FIFOs
Local Bus
Interface:
- Select Bus
Width 8,16,
or 32 bit
- Endian
Conversion
- Select Muxed
or non-Muxed
Addr/Data
Local Bus
State
Machines
EEPROM
Initialization
I2O Messaging
Dir. Master Write
Dir. Master Read
Dir. Slave Write
Dir. Slave Read
DMA1 PCI/Loc
DMA1 Loc/PCI
DMA0 PCI/Loc
DMA0 Loc/PCI
Control
Logic
I2O Messaging
DMA
DMA Chaining
Unaligned Xfer
Run-Time
PCI Target
(for Direct
Slave Xfers)
PCI Initiator
(For Ch 1
DMA Xfers)
PCI Initiator
(For Ch 0
DMA Xfers)
PCI Initiator
(for Direct
Master Xfers)
Local Master
(for Direct
Slave Xfers)
Local Master
(For Ch 1
DMA Xfers)
Local Master
(For Ch 0
DMA Xfers)
Local Slave
(for Direct
Master Xfers)
Figure 1-2. PCI 9080 Internal Block Diagram
1.1 APPLICATIONS FOR THE PCI 9080
1.1.1 PCI Adapter Cards
Major PCI adapter card applications for the PCI 9080
include high performance communications, networking,
disk control, multimedia and video adapters. The PCI
9080 moves data between the host PCI bus and the
adapter local bus in several ways. First, the local CPU
or host processor may program the DMA controller of
the PCI 9080 to move data between the adapter
memory and the host PCI bus. Second, the 9080 can
perform “Direct Master Transfers,” whereby a local CPU
or controller accesses the PCI bus directly through a
PCI master transfer. The 9080 also supports slave
transfers in which another PCI device is the master.
Finally, the 9080 contains a complete messaging unit
with mailbox registers, doorbell registers and queue
management pointers that can be used for message
passing under the I
2
O protocol or a custom protocol.
1.1.2 Embedded Systems
Another application for the 9080 is in embedded
systems, such as network hubs and routers, printer
engines and industrial equipment. In this configuration,
all four of the above-mentioned data transfer modes are
used. In addition, the PCI 9080 supports Type 0 and
Type 1 PCI configuration cycles, which allows the
embedded CPU to act as the embedded system host
and to configure the other PCI devices in the system.
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