Altera SerialLite III Streaming MegaCore Function User Manual
Page 66
Condition
Error Indication
Core Behavior
Sink Core
Diagnostic code word
CRC-32 error
The sink core asserts
error[(lanes+3)-lane]
flag for one clock
cycle.
The sink interface detects a metaframe CRC-
32 error on one of the lanes. These errors are
reported on a per-lane basis for diagnostic
purposes.
Lane alignment
failure during normal
operation
The sink core asserts
error[2] flag for one
clock cycle.
The sink interface detects a loss of lane
alignment during normal operation.
Burst code word
received during
normal operation
The sink core asserts
error[1] flag for one
clock cycle.
The sink interface receives a burst control
word after achieving normal operation.
Normally, the sink interface receives only a
single burst control word at the end of link
initialization.
Rate adaptation FIFO
buffer underflow in
sink interface
The sink core asserts
error[0] flag for one
clock cycle.
There is an underflow on the rate adaptation
FIFO buffer in the sink interface. The core
behavior depends on the operation mode:
• Continuous mode—error is flagged once
an underflow is detected.
• Burst mode—error is flagged only when an
overflow occurs during burst data transfer
across the user interface.
UG-01126
2015.05.04
Error Handling
5-11
SerialLite III Streaming IP Core Design Guidelines
Altera Corporation