
Chapter 12: Stratix V Transceiver Native PHY IP Core 12–29
10G PCS Parameters
November 2012 Altera Corporation Altera Transceiver PHY IP Core
User Guide
Interlaken Disparity Generator and Checker
The Disparity Generator monitors the data transmitted to ensure that the running
disparity remains within a
96-bit bound. It adds the 67
th
bit to indicate whether or
not the data is inverted. The Disparity Checker monitors the status of the 67
th
bit of
the incoming word to determine whether or not to invert bits[63:0] of the received
word. Table 12–28 describes Interlaken disparity generator and checker parameters.
f For more information refer to the Disparity Generator and Disparity Checker sections in
Transceiver Architecture in Stratix V Devices.
Block Synchronization
The block synchronizer determines the block boundary of a 66-bit word for the
10GBASE-R protocol or a 67-bit word for the Interlaken protocol. The incoming data
stream is slipped one bit at a time until a valid synchronization header (bits 65 and 66)
is detected in the received data stream. After the predefined number of
synchronization headers is detected, the block synchronizer asserts
rx_10g_blk_lock
to other receiver PCS blocks down the receiver datapath and to the FPGA fabric. The
block synchronizer is designed in accordance with both the Interlaken protocol
specification and the 10GBASE-R protocol specification as described in IEEE 802.3-
2008 Clause-49. Table 12–29 describes the block synchronizer parameters.
For more information refer to the Block Synchronizer section in Transceiver Architecture
in Stratix V Devices.
Enable RX scrambler On/Off
When you turn this option On, the RX 10G PCS datapath includes
the scrambler function. This option is available for the Interlaken
and 10GBASE-R protocols.
Enable rx_10g_descram_err port On/Off
When you turn this option On, the 10G PCS includes the
rx_10g_descram_err
port.
Table 12–27. Scrambler and Descrambler Parameters (Part 2 of 2)
Parameter Range Description
Table 12–28. Interlaken Disparity Generator and Checker Parameters
Parameter Range Description
Enable Interlaken TX disparity
generator
On/Off
When you turn this option On, the 10G PCS includes the disparity
generator. This option is available for the Interlaken protocol.
Enable Interlaken RX dispar ity
generator
On/Off
When you turn this option On, the 10G PCS includes the disparity
checker. This option is available for the Interlaken protocol.
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