PDI1394L40BE,551 NXP Semiconductors, PDI1394L40BE,551 Datasheet - Page 35

• Manufacturer Part Number: PDI1394L40BE,551
• Manufacturer: NXP Semiconductors

Specifications of PDI1394L40BE,551

• Lead Free Status / Rohs Status: Compliant

Philips Semiconductors
12.6.2.5 Unformatted Transmit
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.
12.6.2.6 Asynchronous Stream Transmit
The PDI1394L40 supports asynchronous stream as specified in IEEE1394a-2000. 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.
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.
2000 Dec 15
1394 enhanced AV link layer controller
31 30
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
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
Figure 22. Asynchronous Stream Packet Transmit Format
Figure 21. Unformatted Transmit Format
dataLength
unformatted packet data
spd
Block data
spd
31
tag
tLabel
tLabel
padding (if needed)
channel
00
1
1110
1110
1010
priority
SV01087
SV01050
priority
sy
PDI1394L40
Preliminary specification