Datasheet

4–7
4.2.1.2 Quadlet Read-Response and Write-Response Packets
The format for a quadlet read-response packet is shown in Figure 4–11. The first quadlet read from the GRF
is the packet token described in section 3.3.4. It contains packet-reception status information added by the
TSB12LV01B. The first 16 bits of the second quadlet contains the destination node and bus ID. The second
quadlet also contains the response code of this transaction. The third quadlet is reserved. The fourth quadlet
is the quadlet data used. The format for a quadlet write-response packet is shown in Figure 4–12.
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
rCode reserved
quadlet data
sourceID
PacCom
spd WriteCount tCode ackSent
RESERVED
RESERVED
destinationID tLabel rt tCode priority
Figure 4–11. Quadlet-Receive Format (Read Response)
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
rCode reservedsourceID
PacCom
spd WriteCount tCode ackSent
RESERVED
RESERVED
destinationID tLabel rt tCode priority
Figure 4–12. Quadlet-Receive Format (Write Response)