CPRI IP User Guide

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ID 683595
Date 6/13/2025
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Document Table of Contents
Document Table of Contents x
1. About the CPRI IP 2. Getting Started with the CPRI IP 3. CPRI IP Functional Description 4. CPRI IP Signals 5. CPRI IP Registers 6. CPRI Altera® FPGA IP User Guide Archives 7. Document Revision History for the CPRI IP User Guide
1. About the CPRI IP x
1.1. CPRI IP Features 1.2. CPRI IP Device Family and Speed Grade Support 1.3. IP Verification 1.4. Resource Utilization for CPRI IP 1.5. CPRI IP Release Information
1.2. CPRI IP Device Family and Speed Grade Support x
1.2.1. CPRI IP Device Family Support 1.2.2. CPRI IP Device and Transceiver Speed Grade Support
2. Getting Started with the CPRI IP x
2.1. Installation and Licensing 2.2. Generating a CPRI IP 2.3. CPRI IP Parameters 2.4. Integrating the CPRI IP into your Design: Required External Blocks 2.5. Simulating Intel FPGA IP Cores 2.6. Running the CPRI IP Design Example 2.7. CPRI IP Design Example Clocks 2.8. About the Testbench 2.9. Compiling the Full Design and Programming the FPGA
2.1. Installation and Licensing x
2.1.1. Intel FPGA IP Evaluation Mode
2.2. Generating a CPRI IP x
2.2.1. CPRI IP Generated Files
2.4. Integrating the CPRI IP into your Design: Required External Blocks x
2.4.1. Adding the Transceiver TX PLL IP 2.4.2. Adding the Reset Controller 2.4.3. Adding the Transceiver Reconfiguration Controller 2.4.4. Adding the Off-Chip Clean-Up PLL 2.4.5. Adding and Connecting the Single-Trip Delay Calibration Blocks 2.4.6. CPRI IP Transceiver PLL Calibration 2.4.7. Reference and System PLL Clock for your IP Design
2.4.7. Reference and System PLL Clock for your IP Design x
2.4.7.1. System PLL Connections for the Agilex® 7 F-tile Variations 2.4.7.2. System PLL Connections for the Agilex 5 Variations 2.4.7.3. Reset Sequencer Connections for the Agilex 5 Variations
3. CPRI IP Functional Description x
3.1. Interfaces Overview 3.2. CPRI IP Clocking Structure 3.3. CPRI IP Reset Requirements 3.4. Start-Up Sequence Following Reset 3.5. AUX Interface 3.6. Direct IQ Interface 3.7. Ctrl_AxC Interface 3.8. Direct Vendor Specific Access Interface 3.9. Real-Time Vendor Specific Interface 3.10. Direct HDLC Serial Interface 3.11. Direct L1 Control and Status Interface 3.12. L1 Debug Interface 3.13. Media Independent Interface (MII) to External Ethernet Block 3.14. Gigabit Media Independent Interface (GMII) to External Ethernet Block 3.15. CPU Interface to CPRI IP Registers 3.16. Auto-Rate Negotiation 3.17. Extended Delay Measurement 3.18. CPRI IP Deterministic Latency 3.19. CPRI IP Transceiver and Transceiver Management Interfaces 3.20. Testing Features
3.2. CPRI IP Clocking Structure x
3.2.1. Example CPRI IP Clock Connections in Different Clocking Modes
3.4. Start-Up Sequence Following Reset x
3.4.1. Start-Up Sequence Interface Signals
3.5. AUX Interface x
3.5.1. AUX Interface Signals 3.5.2. AUX Interface Synchronization 3.5.3. Auxiliary Latency Cycles 3.5.4. Direct Interface CPRI Frame Data Format
3.14. Gigabit Media Independent Interface (GMII) to External Ethernet Block x
3.14.1. GMII Normal Mode 3.14.2. Ethernet PCS Bypass Mode 3.14.3. Ethernet PCS Run-Time Switching
3.15. CPU Interface to CPRI IP Registers x
3.15.1. CPU Interface Signals 3.15.2. Accessing the Hyperframe Control Words
3.15.2. Accessing the Hyperframe Control Words x
3.15.2.1. Specifying the Control Word 3.15.2.2. Specifying the Position in the Control Word 3.15.2.3. Retrieving the Hyperframe Control Words 3.15.2.4. Writing the Hyperframe Control Words
3.17. Extended Delay Measurement x
3.17.1. Extended Delay Measurement for Soft Internal Buffers 3.17.2. Extended Delay Measurement for Stratix® 10 Hard FIFOs 3.17.3. Extended Delay Measurement Interface
3.19. CPRI IP Transceiver and Transceiver Management Interfaces x
3.19.1. CPRI Link 3.19.2. Main Transceiver Clock and Reset Signals 3.19.3. Arria V, Arria V GZ, Cyclone V, and Stratix V Transceiver Reconfiguration Interface 3.19.4. Arria® 10, Stratix® 10, and Agilex® 7 Transceiver Reconfiguration Interface 3.19.5. RS-FEC Interface 3.19.6. Interface to the External Reset Controller 3.19.7. Interface to the External PLL 3.19.8. Transceiver Debug Interface
3.20. Testing Features x
3.20.1. CPRI IP Loopback Modes 3.20.2. CPRI IP Self-Synchronization Feature
4. CPRI IP Signals x
4.1. CPRI IP Core L2 Interface 4.2. CPRI IP Core L1 Direct Access Interfaces 4.3. CPRI IP Core Management Interfaces 4.4. CPRI IP Core Transceiver and Transceiver Management Signals
1. About the CPRI IP
2. Getting Started with the CPRI IP
3. CPRI IP Functional Description
4. CPRI IP Signals
5. CPRI IP Registers
6. CPRI Altera® FPGA IP User Guide Archives
7. Document Revision History for the CPRI IP User Guide

4.4. CPRI IP Core Transceiver and Transceiver Management Signals

The CPRI IP configures the interface to the CPRI serial link in an Altera® FPGA device transceiver channel. The IP core provides multiple interfaces for managing the transceiver. The transceiver is configured with a Native PHY IP core and exposes many of its optional interfaces for ease of IP core integration in your design.

Table 57.  Transceiver and Transceiver Management Signals

Signal Name

Direction

Description

xcvr_cdr_refclk Input Main transceiver clock and reset-done signals

The tx_analogreset_ack and rx_analogreset_ack signals are available only in Arria® 10 and Stratix® 10 variations.

xcvr_recovered_clk Output
xcvr_reset_tx_done Output
xcvr_reset_rx_done Output
tx_analogreset_ack Output
rx_analogreset_ack Output
ehip_ref_clk[1:0] Input
ehip_rst_n 17 Input
ehip_tx_pll_locked 17 Output
xcvr_rxdatain

Input

CPRI link interface
xcvr_txdataout

Output

xcvr_los

Input

reconfig_clk Input 28-nm device transceiver reconfiguration interface

These signals are present only in IP core variations that target an Arria V, Arria V GZ, Cyclone V, or Stratix V device.

reconfig_to_xcvr[69:0] Input
reconfig_from_xcvr[45:0] Output
reconfig_clk Input Arria® 10 or Stratix® 10 transceiver reconfiguration interface

These signals are present only in IP core variations that target an Arria® 10 or Stratix® 10 device.

reconfig_reset Input
reconfig_write

Input

reconfig_read

Input

reconfig_address[9:0]

Input

reconfig_writedata[31:0]

Input

reconfig_readdata[31:0]

Output

reconfig_waitrequest

Output

reconfig_readdata_valid 17 Output
reconfig_address[10:20] 17 Output
xcvr_tx_analogreset

Input

Interface to external reset controller
xcvr_tx_digitalreset

Input

xcvr_tx_cal_busy

Output

xcvr_rx_analogreset

Input

xcvr_rx_digitalreset

Input

xcvr_rx_cal_busy

Output

xcvr_reset_tx_ready

Input

xcvr_reset_rx_ready

Input

xcvr_rx_analogreset_stat 18 Output
xcvr_rx_digitalreset_stat 18 Output
xcvr_rx_analogreset_stat 18 Output
xcvr_tx_digitalreset_stat 18 Output
xcvr_ext_pll_clk Input Interface to external TX PLL
xcvr_rx_is_lockedtodata Output Transceiver debug interface
xcvr_rx_is_lockedtoref Output Transceiver debug interface

These signals are present only if you turn on Enable L1 debug interfaces in the CPRI parameter editor.

xcvr_rx_errdetect[3:0] Output
xcvr_rx_disperr[3:0] Output
xcvr_rx_blk_sh_err Output
Related Information
17

This signal is only present in IP core variations that target an Stratix® 10 E-tile or Agilex® 7 E- tile device.

17
18 These signals are present only in IP core variation that target an Stratix® 10 device.
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