參數(shù)資料
型號: PDI1394L41
廠商: NXP Semiconductors N.V.
英文描述: Content Protection AV Link Layer(內(nèi)容可保護的AV鏈接層控制器)
中文描述: 影音內(nèi)容保護鏈路層(內(nèi)容可保護的視聽鏈接層控制器)
文件頁數(shù): 35/81頁
文件大?。?/td> 303K
代理商: PDI1394L41
Philips Semiconductors
Preliminary specification
PDI1394L41
1394 content protection AV link layer controller
2000 Apr 15
32
12.6.2.5
The unformatted transmit format is shown in Figure 21. The first quadlet contains packet control information. The remaining quadlets contain
data that is transmitted without any formatting on the bus. No CRC is appended on the packet, nor is any data in the first quadlet sent. This is
used to send PHY configuration and Link-on packets. Note that the bit-inverted check quadlet must be included in the FIFO since the AV Link
core will not generate it.
Unformatted Transmit
spd
tLabel
1110
priority
29 28 272625 24 23 22 212019 18 1716 15 1413 12 11 10 9 8 7 6 5 4 3 2 1 0
unformatted packet data
SV01087
31 30
00
Figure 21.
Unformatted Transmit Format
12.6.2.6
The PDI1394L41 supports asynchronous stream as specified in IEEE1394.a. The asynchronous stream packet format is shown below. The first
quadlet contains packet control information. The second quadlet contains datalength, tag, channel number, and synchronization code. The third
quadlet contains the datalength in quadlets. The datalength can be zero for empty asynchronous stream packets.
Asynchronous Stream Transmit
SV01050
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
spd
tLabel
1
1110
priority
dataLength
tag
channel
1010
sy
Block data
padding (if needed)
Figure 22.
Asynchronous Stream Packet Transmit Format
When a packet conforming to this format is written to either asynchronous transmit FIFO, an asynchronous stream packet (identical on the
cable to an isochronous packet) will be transmitted during the asynchronous phase of a bus cycle.
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