Altera 100G Interlaken MegaCore Function User Manual
Page 70
Signal Name
Direction
Width (Bits)
Description
crc24_err
Output
1
A CRC24 error flag covering both control word
and data word. This signal does not associate
the CRC24 error with a particular packet.
Instead, its value indicates the overall SERDES
status. You can use this signal to count the
number of CRC24 errors.
This signal is asserted as a single cycle wide
pulse. If the IP core detects back-to-back
CRC24 errors, this signal toggles.
crc32_err
Output
Number of lanes
An error flag indicating diagnostic CRC32
failures per lane. This signal is asserted as a
single cycle wide pulse. If back-to-back CRC32
errors are detected, this signal toggles.
irx_overflow
Output
1
An error flag indicating the presence of
excessive jitter at the receiver side. This signal is
included in the current IP core opportunisti‐
cally for diagnostic purposes.
rdc_overflow
Output
1
An error flag indicating that the RX domain-
crossing FIFO is currently overflowed. The RX
domain-crossing FIFO transfers data from the
PCS clock domain to the MAC clock domain.
rg_overflow
Output
1
An error flag indicating that the Reassembly
FIFO is currently overflowed. The Reassembly
FIFO is the receiver FIFO that feeds directly to
the user data interface.
rxfifo_fill_
level
Output
RXFIFO_ADDR_
WIDTH
The fill level of the Reassembly FIFO, in units of
64-bit words. The width of this signal is the
value of the RXFIFO_ADDR_WIDTH
parameter, which is 12 by default. You can use
this signal to monitor when the RX Reassembly
FIFO is empty.
sop_cntr_inc
Output
1
A pulse indicating that the 100G Interlaken IP
core receiver user data interface received a start-
of-packet. You can use this signal to increment
a count of SOPs the application observes on the
receive interface.
eop_cntr_inc
Output
1
A pulse indicating that the 100G Interlaken IP
core receiver user data interface received an
end-of-packet. You can use this signal to
increment a count of EOPs the application
observes on the receive interface.
5-12
100G Interlaken IP Core Interlaken Link and Miscellaneous Interface Signals
UG-01128
2015.05.04
Altera Corporation
100G Interlaken MegaCore Function Signals