82C881 Datasheet, PDF (43/46 Pages) List of Unclassifed Manufacturers – FireLink 1394 OHCI Link Controller

FireLink 1394 OHCI
82C881
10.2.1.2.1
Rx FIFO Receive Data
START DELIMITER
HEADER
DATA
END DELIMITER
10.2.1.2.2
Isochronous Receive Packet Format
START DELIMITER
HEADER
DATA
TRAILER
END DELIMITER
10.2.1.2.3 Other Receive Packet Formats
• Receive packet start delimiter format
Field Name
endDelimiter
pktType
Width
1
2
Reserved
2
phyPktType
2
timeStamp
16
speed
3
busReset
1
postedWrPkt
1
Bit Position
0
2:1
4:3
6:5
22:7
25:23
26
27
Description
0 – Start Delimiter,
1 – End Delimiter
Packet type (for combined DMA)
00 – Isochronous receive
01 – Asynchronous receive
10 – Self ID receive
11 – Invalid
Currently not used
Physical Packet type
00 – Invalid
01 – physical Range
10 – Bus Management resource registers
(which are accessible by quadlet Read and quadlet
lock transactions)
11 – config ROM header, Bus ID, Bus options and
GUID
The time at which this packet was received by the
OHCI_LINK.
This is the speed at which the packet was received by
the PHY.
000 – 100Mbps,
001 – 200 Mbps,
010 – 400 Mbps
This bit if set implies that the packet associated with
this delimiter is a bus reset packet
Thid bit is set if the packet associated with this start
delimiter is a posted write packet.
912-2000-031
Revision: 1.0
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