参数资料
型号: TSB12LV26PZ
厂商: Texas Instruments, Inc.
英文描述: OHCI-Lynx PCI-BASED IEEE 1394 HOST CONTROLLER
中文描述: OHCI的山猫基于PCI的1394主控制器
文件页数: 64/106页
文件大小: 605K
代理商: TSB12LV26PZ
5
8
5.1.3.2
Asynchronous Packet Receive With Headers and Trailer
Step 1:
Asynchronous packet is received through the receiver logic of the link core.
Step 2:
The header quadlets are loaded into their respective header registers AND routed to the
DM port without any buffering.
Step 3:
Packet data is routed directly to the DM port (no buffering performed).
Step 4:
Trailer quadlet is loaded into the trailer register at 48h.
CFR REGISTER
Step 1
Header0 Register at 38h
Trailer Register at 48h
LINK CORE
Transmitter
Receiver
Quadlet#0
Packet received
from 1394 bus
through the Phy
Header1 Register at 3Ch
Quadlet#1
Header2 Register at 40h
Quadlet#2
Header3 Register at 42h
Quadlet#3
Loaded only in
Block Receive
Data
Mover
Port
Step 4 (trailer quadlet)
Step 3 (packet data)
Step 2 (header quadlet)
Figure 5
10. Asynchronous Receive With Headers and Trailer
5.1.4
There are two ways (modes of operation) to transmit asynchronous data through the data mover:
Asynchronous Transmit
Asynchronous packet transmit with automatic header insertion.
Asynchronous packet transmit without automatic header insertion.
The difference between the two modes lies in the mechanism in which the header information is inserted
into the data stream. However, in both cases, the header information is always loaded into the link core
transmitter from the header registers.
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