
Chapter 13: Arria V Transceiver Native PHY IP Core 13–5
PMA Parameters
November 2012 Altera Corporation Altera Transceiver PHY IP Core
User Guide
TX PLL<n>
Table 13–5 allows you to define multiple TX PLLs for your Native PHY. The Native
PHY GUI provides a separate tab for each TXPLL.
Number of TX PLLs 1–4
Specifies the number of TX PLLs required. More than 1 PLL is
typically required if your design reconfigures channels to run at
multiple frequencies.
Main TX PLL logical index 0–3 Specifies the index of the TX PLL used in the initial configuration.
Number of TX PLL reference
clocks
1–5
Specifies the total number of reference clocks that are used by all
of the PLLs.
Table 13–4. TX PMA Parameters
Parameter Range Description
Table 13–5. TX PLL Parameters
Parameter Range Description
PLL type CMU This is the only PLL type available.
PLL base data rate Device Dependent
Shows the base data rate of the clock input to the TX PLL.The
PLL base data rate is computed from the TX local clock division
factor multiplied by the Data rate.
Select a PLL base data rate that minimizes the number of PLLs
required to generate all the clocks for data transmission. By
selecting an appropriate PLL base data rate, you can change
data rates by changing the TX local clock division factor used by
the clock generation block.
Reference clock frequency Device Dependent
Specifies the frequency of the reference clock for the Selected
reference clock source index you specify. You can define a single
frequency for each PLL. You can use the Transceiver
Reconfiguration Controller shown in Arria Native Transceiver
PHY IP Core to dynamically change the reference clock input to
the PLL.
Note that the list of frequencies updates dynamically when you
change the Data rate. The Input clock frequency drop down
menu is populated with all valid frequencies derived as a function
of the Data rate a
nd Base data rate.
Selected reference clock source 0–4
You can define up to 5 reference clock sources for the PLLs in
your core. The Reference clock frequency selected for index 0,
is assigned to TX PLL<0>. The Reference clock frequency
selected for index 1, is assigned to TX PLL<1>, and so on.
Selected clock network
non-bonded
×N
Specifies non-bonded (separate) or shared PLLs for the clock
network.
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