
15–4 Chapter 15: Cyclone V Transceiver Native PHY IP Core
PMA Parameters
Altera Transceiver PHY IP Core November 2012 Altera Corporation
User Guide
PMA Parameters
Table 15–3 describes the options available for the PMA.
f For more information about the PMA, refer to the PMA Architecture section in the
Transceiver Architecture in Cyclone V Devices.Some parameters have ranges where the
value is specified as Device Dependent. For such parameters, the possible range of
frequencies and bandwidths depends on the device, speed grade, and other design
characteristics. Refer to Device Datasheet for Cyclone V Devices for specific data for
Cyclone V devices.
TX PMA Parameters
Table 15–4 describes the TX PMA options you can specify.
f For more information about PLLs in Cyclone V devices, refer to the Cyclone V PLLs in
Clock Networks and PLLs in Cyclone V Devices in the Cyclone V Device Handbook
Table 15–3. PMA Options
Parameter Range Description
Data rate Device Dependent Specifies the data rate. The maximum data rate is 5 Gbps.
TX local clock division factor 1, 2, 4, 8
Specifies the value of the divider available in the transceiver
channels to divide the input clock to generate the correct
frequencies for the parallel and serial clocks. This divisor divides
the fast clock from the PLL in non-bonded configurations.
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 15–4. 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. 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 input clock port for
connection to the fast clock from an external PLL,
ext_pll_clk[<p>-1:0]
that you can connect to external PLLs.
Use feature when need to perform TX PLL switching between
fractional PLL and a CMU PLL.
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