Altera SerialLite II Protocol - Manual (Page 74)

74 Altera Corporation
SerialLite II Protocol Reference Manual
Error Events & Handling
Packets Marked Bad
A transmitted packet is tagged with the {EBP} sequence under the
following conditions:
■ User-side interface protocol error for user packets
■ User-indicated packet is bad through the assertion of TERR on the
user-side interface
■ Upon receiving packets with {EBP}, the receiver forwards the packets
to the user logic and asserts the error signal on the user-side interface
Status Indication
The SerialLite II protocol requires a status port to indicate various errors
and internal operating status.
Table 2–26 lists the required status signals.
Table 2–26. Status Output Signal Assignments
Name Type Logic Description
LINK_UP Static Active high 0 = Indicates link initialization status
1 = Indicates link active status
CATA_ERR Static Active high 0 = No catastrophic errors
1 = Catastrophic error detected
LINK_ERR Pulsed Active high 0 = No link errors
1 = Link error detected
DATA_ERR Pulsed Active high 0 = No data errors
1 = Data error detected