Visible to Intel only — GUID: bag1615577054701
Ixiasoft
2.5.1. System PLL Configuration
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 Intel FPGA IP for your F-Tile Interlaken Intel® FPGA 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 2 | User Configuration | User Configuration |
Refclk source (syspll_refclk_src_<m>) |
RefClk #<n> | RefClk #<n> | RefClk #<n> |
Output frequency (syspll_freq_mhz_<m>) |
Any frequency2 | 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 3 | User desired refclk frequency3 | - |
Refclk frequency #<n> (refclk_fht_freq_mhz_txt_<n>) |
- | - | User desired refclk frequency3 |
System PLL Output Enable <n> (systempll_output_enable_<n>) |
- | Yes | Yes |
Figure 5. Port Connection between F-Tile Reference and System PLL Clocks Intel FPGA IP and F-Tile Interlaken Intel® FPGA IP
2 This is a mandatory requirement for each F-tile if there is no other system in use.
3 The frequency must be the same as the reference clock set in F-Tile Interlaken Intel® FPGA IP.