1748 - Common Public Radio Interface - IP Core: Do I need to use a clock cleaner when using CPRI IP core (Common Public Radio Interface) with Lattice SERDES based FPGA?

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  Lattice CPRI IP core (Common Public Radio Interface) itself provides the auto-negotiation function. There is a state machine that will automatically go through a searching state from one line rate to the next line rate, eventually it will find the ...

• 1873 - [LatticeECP3] Common Public Radio Interface - IP Core: Is the FIFO bridge in the PCS (Physical Coding Sub-layer) used in the low latency CPRI (Common Public Radio Interface) IP (Intellectual Property) core?

  LatticeECP3 supports CPRI (Common Public Radio Interface) low latency mode operation and the FIFO bridge in the SERDES/PCS is bypassed. The conditions are that the operation runs at full synchronous mode and data is handed off from SerDes/PCS to FPGA ...

• 356 - In Lattice parts with SERDES/PCS, how can I control the word aligner using my own FPGA-based link state machine ?

  You can use the word_align_en_[0-3]/ffc_enable_cgalign_ch[0-3] either in an 8b10b based or 10-bit SERDES only based mode. The simulation waveforms below shows how a low pulse on the word_align_en_0 (LatticeSC/LatticeECP3 signal that has same function ...

• 1890 - LatticeECP3: The Lattice SerDeS-based FPGA has two reference clock sources for SERDES. Are there any differences between the dedicated clock input source and the FPGA reference clock source for the SERDES?

  Lattice SerDeS-based FPGA products(such as LatticeECP3 and LatticeSC) in general, provide two choices of reference clock source for the SERDES. One is the dedicated input for the SERDES/PCS block(typically differential CML input pins), and another ...

• 7762 - PCIe: Does Lattice ECP3 Serdes reference clock compatible with HCSL driver?

  For ECP3, the recommendations for the SerDes Reference Clock Interface are based on the LVDS and LVPECL standards and these are guaranteed to have no issues with the 100-ohm termination. You may refer to the Electrical Recommendations for Lattice ...