For Interlaken, the NRZ mode is supported without FEC while the PAM4 mode is supported with FEC.
Instantiate the F-Tile Reference and System PLL Clocks IP for your F-Tile
Interlaken IP design with the following parameters:
| Parameters | Value for NRZ Mode | Value for PAM4 Mode (FGT) | Value for PAM4 Mode (FHT) |
|---|---|---|---|
|
Mode of System
PLL
(syspll_mod_<m>) |
User Configuration 5 | User Configuration | User Configuration |
|
Refclk
source
(syspll_refclk_src_<m>) |
RefClk #<n> | RefClk #<n> | RefClk #<n> |
|
Output
frequency
(syspll_freq_mhz_<m>) |
Any frequency5 |
Without eFIFO: 830.078125 MHz With eFIFO: Frequency selected from user interface parameter (System PLL clock frequency). |
Frequency selected from user interface parameter (System PLL clock frequency). |
|
Enable Refclk
#<n> for FGT
PMA
(refclk_fgt_output_enable_<n>) |
Yes | Yes | - |
|
Enable FHT
Common PLL <n>
for FHT PMA
(cmnpll_enable_<n>) |
- | - | Yes |
|
Refclk
frequency #<n>
(refclk_fgt_freq_mhz_<n>) |
User desired refclk frequency 6 | User desired refclk frequency6 | - |
|
Refclk
frequency #<n>
(refclk_fht_freq_mhz_txt_<n>) |
- | - | User desired refclk frequency6 |
|
System PLL
Output Enable <n>
(systempll_output_enable_<n>) |
- | Yes | Yes |
Figure 5. Port Connection between F-Tile Reference and System PLL
Clocks IP and F-Tile Interlaken IP
5 Mandatory for each F-Tile if no other
system is in use.
6 The
frequency must be the same as the reference clock set in
F-Tile Interlaken IP.