
Chapter 12: Stratix V Transceiver Native PHY IP Core 12–17
Standard PCS Parameters
November 2012 Altera Corporation Altera Transceiver PHY IP Core
User Guide
RX word aligner mode
bit_silp
sync_sm
manual
Specifies one of the following 3 modes for the word aligner:
■ Bit_slip: You can use bit slip mode to shift the word boundary.
For every rising edge of the
rx_bitslip
signal, the word
boundary is shifted by 1 bit. Each bit-slip removes the earliest
received bit from the received data
■ Sync_sm: In synchronous state machine mode, a
programmable state machine controls word alignment. You
can only use this mode with 8B/10B encoding. The data width
at the word aligner can be 10 or 20 bits
■ Manual: This mode Enables word alignment by asserting the
rx_std_wa_patternalign
. This is an edge sensitive signal.
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 12–17. Word Aligner and Bit-Slip Parameters (Part 2 of 2)
Parameter Range Description
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