User guide

Analog Parameter Settings
8
2015.05.11
UG-01143
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Transceiver analog parameter settings are used to tune the analog functions in the physical medium
attachment (PMA) and the PLL blocks while designing high-speed serial protocol solutions. You can use
this feature to compensate for signal losses for high data rate communication.
Most transceiver parameters can be set using the Parameter Editor before generating the transceiver PHY
IP. The parameters that depend on place and route decisions, device constraints, and tunable analog
settings that cannot be set before IP generation are controlled in the following ways:
• Making analog parameter settings to I/O pins using the Assignment Editor.
• Updating the Quartus II Settings File (.qsf) with the known assignment.
• Using the Reconfiguration Interface to dynamically change the analog settings.
Making Analog Parameter Settings using the Assignment Editor
To make assignments using the Assignment Editor, complete the following steps:
1. On the Assignments menu, select Assignment Editor. The Assignment Editor appears.
2. Click inside the Assignment Name column and select the appropriate assignment. Refer to the PMA
Analog Settings section for the list of available assignments for PMA analog settings.
3. Click inside the Value column and select the appropriate value for your assignment.
The Quartus II software adds these instance assignments to the .qsf file for your project.
Related Information
Analog Parameter Settings List on page 8-2
Updating Quartus Settings File with the Known Assignment
The Quartus II Settings File (.qsf) contains all the entity-level assignments and settings for the current
revision of the project. The Quartus Settings File is based on Tcl script syntax.
When you create assignments and settings using the Parameter Editor wizards and dialog boxes or Tcl
commands, the Quartus II software automatically places the assignments at the end of the Quartus II
Settings File. To control the analog parameters, you can directly add or modify the appropriate
assignment in the Quartus II Settings File. The assignments you create are recognized, regardless of where
you place them in the file.
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