Altera Transceiver PHY IP Core Bedienungsanleitung Seite 224

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Table 9-8: 8B/10B Options
Name Value Description
Enable 8B/10B decoder/encoder On/Off Enable this option if your application
requires 8B/10B encoding and
decoding. This option on adds the
tx_datak <n>, rx_datak <n>, and
rx_runningdisp <n> signals to your
transceiver.
Enable manual disparity control On/Off When enabled, you can use the tx_
forcedisp signal to control the
disparity of the 8B/10B encoder.
Turning this option on adds the tx_
forcedisp and tx_dispval signals
to your transceiver.
Create optional 8B/10B status port On/Off Enable this option to include the 8B/
10B rx_errdetect and rx_disperr
error signals at the top level of the
Custom PHY IP Core.
Byte Order Parameters
The byte ordering block is available when the PCS width is doubled at the byte deserializer. Byte ordering
identifies the first byte of a packet by determining whether the programmed start-of-packet (SOP) pattern
is present; it inserts enough pad characters in the data stream to force the SOP to the lowest order byte
lane.
Note:
You cannot enable Rate Match FIFO when your application requires byte ordering. Because the
rate match function inserts and deletes idle characters, it may shift the SOP to a different byte lane.
UG-01080
2015.01.19
Byte Order Parameters
9-11
Custom PHY IP Core
Altera Corporation
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