
Chapter 11: Deterministic Latency PHY IP Core 11–11
PLL Reconfiguration Parameters
November 2012 Altera Corporation Altera Transceiver PHY IP Core
User Guide
f For more information about the individual the word aligner and TX bitslip
functionality, refer to Transceiver Architecture in Arria V Devices in the Arria V Device
Handbook, Transceiver Architecture in Cyclone V Devices in the Cyclone V Device
Handbook, or Transceiver Architecture in Stratix V Devices in the Stratix V Device
Handbook as appropriate.
PLL Reconfiguration Parameters
Table 11–9 lists the PLL Reconfiguration options. For more information about
transceiver reconfiguration registers, refer to PLL Reconfiguration.
TX bitslip On/Off
TX bitslip is enabled whenever the word aligner is in Manual
alignment mode. The TX bitslipper uses the value of
bitslipboundarselect[4:0]
to compensate for bits slipped on
the RX datapath to achieve deterministic latency.
Enable run length violation
checking
On/Off
If you turn this option on, you can specify the run length which is the
maximum legal number of contiguous 0s or 1s. This option also
creates the
rx_rlv
output signal which is asserted when a run length
violation is detected.
Run length 5–160
Specifies the threshold for a run-length violation. Must be a multiple
of 5.
Create optional word aligner
status ports
On/Off
Enable this option to include the
rx_patterndetect
and
rx_syncstatus
ports.
Create optional 8B/10B
control and status ports
On/Off
Enable this option to include the 8B/10B
rx_runningdisp
,
rx_errdetect
, and
rx_disperr
signals at the top level of the
Deterministic Latency PHY IP Core.
Create PMA optional status
ports
On/Off
Enable this option to include the 8B/10B
rx_is_lockedtoref
,
rx_is_lockedtodata
, and
rx_signaldetect
signals at the top
level of the Deterministic Latency PHY IP Core.
Avalon data interfaces On/Off
This option is typically required if you are planning to import your
Deterministic Latency PHY IP Core into a Qsys system.
Enable embedded reset
controller
On/Off
When you turn this option On, the embedded reset controller handles
reset of the TX and RX channels at power up. If you turn this option
Off, you must design a reset controller that manages the following
reset signals:
tx_digitalreset
,
tx_analogreset
,
tx_cal_busy
,
rx_digitalreset
,
rx_analogreset
, and
rx_cal_busy
. You may
also use the Transceiver PHY Reset Controller to reset the
transceivers. For more information, refer to the Transceiver
Reconfiguration Controller IP Core
Table 11–8. Additional Options (Part 2 of 2)
Name Value Description
Table 11–9. PLL Reconfiguration Options
Name Value Description
Allow PLL/CDR
Reconfiguration
On/Off
You must enable this option if you plan to reconfigure the PLLs in
your design. This option is also required to simulate PLL
reconfiguration.
Number of TX PLLs Device dependent
Specifies the number of TX PLLs required for this instance of the
Custom PHY. More than 1 PLL may be required if your design
reconfigures channels to run at multiple frequencies.
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