
14–6 Chapter 14: Arria V GZ Transceiver Native PHY IP Core
PMA Parameters
Altera Transceiver PHY IP Core November 2012 Altera Corporation
User Guide
TX PMA Parameters
Table 14–4 describes the TX PMA options you can specify.
f For more information about PLLs in Arria V devices, refer to the Arria V PLLs section
in Clock Networks and PLLs in Arria V Devices.
TX PLL base data rate Device Dependent
Specifies the base data rate for the clock input to the TX PLL.
Select a base data rate that minimizes the number of PLLs
required to generate all the clocks required for data transmission.
By selecting an appropriate base data rate, you can change data
rates by changing the divider used by the clock generation block.
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.
Table 14–3. PMA Options (Part 2 of 2)
Parameter Range Description
Table 14–4. TX PMA Parameters
Parameter Range Description
Enable TX PLL dynamic
reconfiguration
On/Off
When you turn this option On, you can dynamically reconfigure
the PLL to use a different reference clock input. This option is
also required to simulate TX PLL reconfiguration. If you turn this
option On, the Quartus II Fitter prevents PLL merging by default;
however, you can specify merging using the
FORCE_MERGE_PLL
QSF assignments.
Use external TX PLL On/Off
When you turn this option On, the Native PHY does not include
TX PLLs. Instead, the Native PHY includes a top-level signal or
bus,
ext_pll_clk[<n>-1:0]
that you can connect to external
PLLs. If you plan to dynamically reconfigure.
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 shared by
all of the PLLs.
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