Altera Stratix GX Transceiver - Manual (Page 38)

2–20 Altera Corporation
Stratix GX Transceiver User Guide January 2005
MegaWizard Analog Features
Figure 2–12. Deserializer Bit Order
MegaWizard
Analog Features This section describes the analog options for the instantiation of the
altgxb
megafunction in the Quartus II MegaWizard ® Plug-In Manager.
Altera ® recommends that the Stratix GX transceiver block be instantiated
and parameterized through the MegaWizard Plug-In Manager. The
MegaWizard Plug-In Manager offers a graphical user interface (GUI) that
organizes the altgxb options in easy-to-use sections. The wizard also
sets the proper ports and parameters automatically, based on the options
and parameters you select. Invalid settings are automatically flagged to
avoid illegal configurations.
Although you can instantiate the Stratix GX block directly by calling out
the altgxb megafunction, Altera recommends using the MegaWizard
Plug-In Manager to instantiate your altgxb megafunction, reducing the
likelihood of invalid settings.
MegaWizard Analog Feature Considerations
Each altgxb MegaWizard Plug-In uses one or more transceiver blocks
based on the number of channels you select. There are four channels per
transceiver block. If a MegaWizard Plug-In Manager instantiation uses
fewer than four channels, the remaining channels in that transceiver
block are not available for use.
Each MegaWizard Plug-In Manager instantiation must have similar
functionality and data rates. If you want transceiver blocks that differ in
functionality and data rates, create a separate MegaWizard Plug-In
Manager instantiation for each transceiver block.
As mentioned in the clocking section, the MegaWizard Plug-In Manager
also displays the configuration of the altgxb megafunction.
Figures 2–13 through 2–19 change dynamically based on the selected
mode, options, and clocking schemes.
Parallel clock
Serial clock
Parallel data
out (hex)
56 00
Serial data in 0 11 0 0 0 1 1