Altera SerialLite II Protocol - Manual (Page 24)

24 Altera Corporation
SerialLite II Protocol Reference Manual
Physical Layer Description
verify a channel number for channel multiplexing. For priority packets,
the second symbol contains both the segment identification and channel
number.
End of Bad Packet Sequence {EBP}
The end of bad packet sequence consists of two symbols as shown in
Table 2–9 . It is used to mark the end of a packet that the transmitter has
decided is unreliable. The first symbol is the /EBP/ control symbol. The
second symbol is a data code-group that can be used to verify a channel
number for channel multiplexing. For priority packets, the second
symbol contains both the segment identification and channel number. See
“Packets Marked Bad” on page 2–74 for more information on the {EBP}.
Suspend User Packet Sequence {SUP}
The suspend user packet sequence consists of two symbols as shown in
Table 2–10 . The first symbol is the /SUP/ control symbol. The second
symbol is a data code-group that can be used to convey a channel number
for channel multiplexing. The SUP signals the end of a burst, allowing for
a switch to a new channel number or insertion of CRC.
Table 2–8. {EGP} Composition
Field Symbol Description
EGP1 /EGP/ End of good packet symbol
EGP2 /DAT/ Segment identification/channel number
Table 2–9. {EBP} Composition
Field Symbol Description
EBP1 /EBP/ End of bad packet symbol
EBP2 /DAT/ Segment identification/channel number
Table 2–10. {SUP} Composition
Field Symbol Description
SUP1 /SUP/ Suspend user packet symbol
SUP2 /DAT/ Channel number