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4. Functional Description
The F-Tile CPRI PHY Intel® FPGA IP consists of the following modules:
- F-Tile transceiver channels which consists of PMA and RS-FEC hard logic to support CPRI and Ethernet protocols. It also contains a hard PCS block that provides 64b/66b encoding scheme for 10.1376, 12.1651, and 24.33024 Gbps CPRI line rates. For more information, refer to the F-tile Architecture and PMA and FEC Direct PHY IP User Guide.
- Soft Reset Controller—a reset controller that manages reset signals according to the F-Tile CPRI PHY Intel® FPGA IP requirements.
- Elastic FIFO (EFIFO)—a dual clock FIFO that matches the rate differences between the F-Tile hard logic and soft logic.
- Latency measurement—a module that generates a sync pulse to measure the datapath delay of the F-Tile CPRI PHY Intel® FPGA IP.
- Low Speed PCS—a soft PCS block that provides the 8b/10b encoding scheme for the CPRI line rates of 9.8 Gbps and below.
Figure 12. IP Block Diagram
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