GTS CPRI PHY IP User Guide

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ID 814577
Date 9/29/2025
Public
Document Table of Contents
Document Table of Contents x
1. About the GTS CPRI PHY IP 2. Getting Started 3. GTS CPRI PHY IP Parameters 4. Functional Description 5. Interface Signals 6. GTS CPRI PHY IP Registers 7. GTS CPRI PHY IP Troubleshooting 8. Document Revision History for the GTS CPRI PHY IP User Guide 9. GTS CPRI PHY IP User Guide Archives
1. About the GTS CPRI PHY IP x
1.1. GTS CPRI PHY IP Features 1.2. GTS CPRI PHY IP Device Family Support 1.3. GTS CPRI PHY IP Device Speed Grade Support 1.4. GTS CPRI PHY IP Release Information
2. Getting Started x
2.1. Installing and Licensing Altera® IP 2.2. Specifying the GTS CPRI PHY IP Parameters and Options 2.3. Generated File Structure 2.4. GTS CPRI PHY IP Testbenches
2.1. Installing and Licensing Altera® IP x
2.1.1. Intel FPGA IP Evaluation Mode
2.2. Specifying the GTS CPRI PHY IP Parameters and Options x
2.2.1. System PLL Clock for Your IP Design
3. GTS CPRI PHY IP Parameters x
3.1. GTS CPRI PHY IP Parameters: IP Tab 3.2. GTS CPRI PHY IP Design Example Parameters 3.3. Analog Parameters for GTS IPs
4. Functional Description x
4.1. Reset Logic 4.2. Latency Measurement
4.2. Latency Measurement x
4.2.1. Deterministic Latency for GTS CPRI PHY IP
5. Interface Signals x
5.1. GTS CPRI PHY IP Clock Signals 5.2. GTS CPRI PHY IP Reset Signals 5.3. GTS CPRI PHY IP TX MII (64b/66b) 5.4. GTS CPRI PHY IP RX MII (64b/66b) 5.5. GTS CPRI PHY IP Status Interface for 64b/66b Line Rate 5.6. GTS CPRI PHY IP TX Interface (8b/10b) 5.7. GTS CPRI PHY IP RX Interface (8b/10b) 5.8. GTS CPRI PHY IP Status Interface for 8b/10b Line Rate 5.9. GTS CPRI PHY IP Serial Interface 5.10. GTS CPRI PHY Reconfiguration Interface 5.11. GTS CPRI PHY IP Dynamic Reconfiguration Local Avalon Memory-Mapped Interface 5.12. GTS CPRI PHY IP Datapath and PMA Avalon Memory-Mapped Interface
5.1. GTS CPRI PHY IP Clock Signals x
5.1.1. GTS CPRI PHY IP Required Clock Frequencies
1. About the GTS CPRI PHY IP
2. Getting Started
3. GTS CPRI PHY IP Parameters
4. Functional Description
5. Interface Signals
6. GTS CPRI PHY IP Registers
7. GTS CPRI PHY IP Troubleshooting
8. Document Revision History for the GTS CPRI PHY IP User Guide
9. GTS CPRI PHY IP User Guide Archives

4.1. Reset Logic

The GTS CPRI PHY IP has three main reset ports:
  • i_tx_rst_n—resets the TX datapath.
  • i_rx_rst_n—resets the RX datapath.
  • i_reconfig_reset—resets the Avalon® memory-mapped interface connections to PCS + PMA CSRs, and soft IP CSR.

During dynamic reconfiguration, you must keep the IP TX and RX datapaths in reset by asserting the following resets:

  • a. i_tx_rst_n
  • b. i_rx_rst_n

Do not assert i_reconfig_reset during dynamic reconfiguration.

Program the following registers for the IP according to dynamic reconfiguration target before datapath resets are deasserted:

  • tx_cpri_fec_en
  • tx_cpri_rate_sel
  • rx_cpri_fec_en
  • rx_cpri_rate_sel

Figure 8. Reset Block Diagram
Level Two Title