User Manual

Framing layer
8-6 Confidential - For internal use 99-137719-D
Figure 8-4: SDU to PDU framing examples
SOF Data C
CRC
Data C Data D Data E Data F
16 bytes
60
64 bytes 16 bytes 64 bytes
Data D
88
Len Port
SOF Data D
CRC
Data E
Len16 bytes 43 bytes 21 bytes
16 bytes
Data F
23 bytes
SOF
CRC
42
Len 41 bytes
Data F
Data A
Data B
SOF Data A
CRC
Hi 41
Data B
77
Len Port
8 bytes 32 bytes
8 bytes 32 bytes
Example with a SDU of 40 bytes, sent with priority high on port 77
Example with a SDU of 160 bytes, sent with priority low on port 88
SOF Data C
CRC
60
Data D
88
Len Port
SOF Data D
CRC
Data E
Len16 bytes 43 bytes 21 bytes
16 bytes
Data F
23 bytes
SOF
CRC
42
Len 41 bytes
Data F
SOF Data A
CRC
9 55
Len Port 8 bytes
Example with the same 160 bytes SDU as above, which is interrupted by a higher priority SDU
SDU
PDU
SDU
PDUs
10
1Lo 260Lo 1 0 0Lo 0
Lo
21 1Hi 0 060Lo 1 0
Lo
0