Philips Semiconductors

Preliminary specification

PDI1394L21

1394 full duplex AV link layer controller

1999 Aug 06

19

12.5.2.1

No-Data Receive

The no-data receive formats are shown below. The first quadlet contains the destination node ID and the rest of the packet header. The second

and third quadlet contain 16-bit source ID and either the 48-bit, quadlet-aligned destination offset (for requests) or the response code (for

responses). The last quadlet contains packet reception status.

destinationID

tLabel

rt

tCode

priority

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

destinationOffsetHigh

destinationOffsetLow

sourceID

SV00257

spd

ackSent

3130

Figure 14. Quadlet Read Request Receive Format

destinationID

tLabel

rt

tCode

priority

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

rCode

sourceID

SV00258

spd

ackSent

31 30

u

Figure 15. Write Response Receive Format