Altera UG-01080 Guía de usuario Pagina 325

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Chapter 14: Arria V GZ Transceiver Native PHY IP Core 14–17
Standard PCS Parameters
November 2012 Altera Corporation Altera Transceiver PHY IP Core
User Guide
Bit Reversal and Polarity Inversion
These functions allow you to reverse bit order, byte order, and polarity to correct
errors and to accommodate different layouts of data. Table 14–19 describes these
parameters.
RX word aligner pattern length 7,8,10,16,20,32
Specifies the length of the pattern the word aligner uses for
alignment.
RX word aligner pattern (hex) User-specified Specifies the word aligner pattern in hex.
Number of word alignment
patterns to achieve sync
1–256
Specifies the number of valid word alignment patterns that must
be received before the word aligner achieves synchronization
lock. The default is 3.
Number of invalid words to lose
sync
1–256
Specifies the number of invalid data codes or disparity errors that
must be received before the word aligner loses synchronization.
The default is 3.
Number of valid data words to
decrement error count
1–256
Specifies the number of valid data codes that must be received to
decrement the error counter. If the word aligner receives enough
valid data codes to decrement the error count to 0, the word
aligner returns to synchronization lock.
Run length detector word count
0–63
Specifies the maximum number of contiguous 0s or 1s in the
data stream before the word aligner reports a run length violation.
Enable rx_std_wa_patternalign
port
On/Off
Enables the optional
rx_std_wa_patternalign
control input
port. A rising edge on this signal causes the word aligner to align
the next incoming word alignment pattern when the word aligner
is configured in manual mode.
Enable rx_std_wa_a1a2size port On/Off Enables the optional
rx_std_wa_a1a2size
control input port.
Enable
rx_std_wa_bitslipboundarysel
port
On/Off
Enables the optional
rx_std_wa_bitslipboundarysel
status
output port.
Enable rx_std_wa_bitslip port On/Off Enables the optional
rx_std_wa_bitslip
control input port.
Enable rx_std_wa_runlength_err
port
On/Off
Enables the optional
rx_std_wa_runlength_err
control input
port.
Table 14–18. Word Aligner and Bit-Slip Parameters (Part 2 of 2)
Parameter Range Description
Table 14–19. Bit Reversal and Polarity Inversion Parameters (Part 1 of 2)
Parameter Range Description
Enable TX bit reversal On/Off
When you turn this option On, the word aligner reverses TX
parallel data before transmitting it to the PMA for serialization.
You can only change this static setting using the Transceiver
Reconfiguration Controller.
Enable RX bit reversal On/Off
When you turn this option On, the
rx_st_bitrev_ena
port
controls bit reversal of the RX parallel data after it passes from
the PMA to the PCS.
Enable RX byte reversal On/Off
When you turn this option On, the word aligner reverses the byte
order before transmitting data. This function allows you to
reverse the order of bytes that were erroneously swapped. The
PCS can swap the ordering of both 8 and10 bit words.
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