Altera UG-01080 Guía de usuario Pagina 336

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14–28 Chapter 14: Arria V GZ Transceiver Native PHY IP Core
10G PCS Parameters
Altera Transceiver PHY IP Core November 2012 Altera Corporation
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 14–29 describes Interlaken disparity generator and checker parameters.
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 14–30 describes the block synchronizer parameters.
Table 14–29. 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.
Table 14–30. Bit Reversal and Polarity Inversion Parameters
Parameter Range Description
Enable RX block synchronizer On/Off
When you turn this option On, the 10G PCS includes the RX block
synchronizer. This option is available for the Interlaken and
10GBASE-R protocols.
Enable rx_10g_blk_lock port On/Off
When you turn this option On, the 10G PCS includes the
rx_10G_blk_lock
output port. This signal is asserted to indicate
the receiver has achieved block synchronization.
This option is available for the Interlaken, 10GBASE-R, and other
protocols that user the PCS lock state machine to achieve and
monitor block synchronization.
Enable rx_10g_blk_sh_err port On/Off
When you turn this option On, the 10G PCS includes the
rx_10G_blk_sh_err
output port. This signal is asserted to
indicate that an invalid sync header has been received. This signal
is active after block lock is achieved.
This option is available for the Interlaken, 10GBASE-R, and other
protocols that user the PCS lock state machine to achieve and
monitor block synchronization.
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