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Chapter 12: Stratix V Transceiver Native PHY IP Core 12–27
10G PCS Parameters
November 2012 Altera Corporation Altera Transceiver PHY IP Core
User Guide
Interlaken CRC32 Generator and Checker
CRC-32 provides a diagnostic tool on a per-lane basis. You can use CRC-32 to trace
interface errors back to an individual lane. The CRC-32 calculation covers the whole
metaframe including the Diagnostic Word itself. This CRC code value is stored in the
CRC32 field of the Diagnostic Word. Table 12–24 describes the CRC-32 parameters.
f For more information refer to the CRC-32 Generator section in Transceiver Architecture
in Stratix V Devices
10GBASE-R BER Checker
The BER monitor block conforms to the 10GBASE-R protocol specification as
described in IEEE 802.3-2008 Clause-49. After block lock is achieved, the BER monitor
starts to count the number of invalid synchronization headers within a 125-
s period.
If more than 16 invalid synchronization headers are observed in a 125-
s period, the
BER monitor provides the status signal to the FPGA fabric, indicating a high bit error.
Table 12–25 describes the 10GBASE-R BER checker parameters.
f For more information refer to the Bit-Error Rate (BER) section in Transceiver
Architecture in Stratix V Devices.
Table 12–24. Interlaken CRC32 Generator and Checker Parameters
Parameter Range Description
Enable Interlaken TX CRC32
Generator
On/Off
When you turn this option On, the TX 10G PCS datapath includes
the CRC32 function.
Enable Interlaken RX CRC32
Generator
On/Off
When you turn this option On, the RX 10G PCS datapath includes
the CRC32 function.
Enable rx_10g_crc32_err port On/Off
When you turn this option On, the 10G PCS includes the
rx_10g_crc32_err
port. This signal is asserted to indicate that
the CRC checker has found an error in the current metaframe.
Table 12–25. 10GBASE-R BER Checker Parameters
Parameter Range Description
Enable rx_10g_highber port
(10GBASE-R)
On/Off
When you turn this option On, the TX 10G PCS datapath includes
the
rx_10g_highber
output port. This signal is asserted to
indicate a BER of >10
4
. A count of 16 errors in 125-s period
indicates a BER > 10
4
. This signal is only available for the
10GBASE-R protocol.
Enable rx_10g_highber_clr_cnt
port (10GBASE-R)
On/Off
When you turn this option On, the TX 10G PCS datapath includes
the
rx_10g_highber_clr_cnt
input port. When asserted, the
BER counter resets to 0. This signal is only available for the
10GBASE-R protocol.
Enable rx_10g_clr_errblk_count
port (10GBASE-R)
On/Off
When you turn this option On, the 10G PCS includes the
rx_10g_clr_errblk_count
input port. When asserted, error
block counter that counts the number of RX errors resets to 0.
This signal is only available for the 10GBASE-R protocol.
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