5–66 Altera Corporation
Stratix Device Handbook, Volume 2 July 2005
Software Support
Figure 5–42. Page 3 of the Transmitter altlvds MegaWizard Plug-In Manager
Number of Channels
The What is the number of channels? parameter specifies the number of
transmitter channels required and the width of the tx_in port. You can
have more than 20 channels in a transmitter or receiver module by typing
in the required number instead of choosing a number from the drop
down menu, which only has selections of up to 20 channels.
Deserialization Factor
The What is the deserialization factor? parameter specifies the number
of bits per channel. The transmitter block supports deserialization factors
of 4, 7, 8, and 10. Based on the factor specified, the Quartus II software
determines the multiplication and/or division factor for the LVDS PLL in
order to serialize the data.
Table 5–5 on page 5–32 lists the differential bit naming convention. The
parallel data for the n
th
channel spans from the MSB (rx_out bit
[(J
× n) – 1]) to the LSB (rx_out bit [J × (n – 1)]), where J is the
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