PHY Lite for Parallel Interfaces Intel® FPGA IP User Guide

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Date 12/13/2021
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Document Table of Contents
Document Table of Contents x
1. About the PHY Lite for Parallel Interfaces IP 2. PHY Lite for Parallel Interfaces Intel Agilex FPGA IP 3. PHY Lite for Parallel Interfaces Intel Stratix 10 FPGA IP 4. PHY Lite for Parallel Interfaces Intel Arria 10 and Intel Cyclone 10 GX FPGA IPs 5. PHY Lite for Parallel Interfaces Intel® FPGA IP User Guide Document Archives 6. Document Revision History for the PHY Lite for Parallel Interfaces IP User Guide
1. About the PHY Lite for Parallel Interfaces IP x
1.1. Device Family Support 1.2. Features
2. PHY Lite for Parallel Interfaces Intel Agilex FPGA IP x
2.1. Release Information 2.2. Functional Description 2.3. Getting Started 2.4. I/O Standards 2.5. Design Guidelines 2.6. Design Example
2.2. Functional Description x
2.2.1. Intel® Agilex™ I/O Sub-bank Interconnects 2.2.2. Intel® Agilex™ Input DQS/Strobe Tree 2.2.3. PHY Lite for Parallel Interfaces Intel® Agilex™ FPGA IP Top Level Interfaces 2.2.4. Dynamic Reconfiguration 2.2.5. I/O Timing
2.2.3. PHY Lite for Parallel Interfaces Intel® Agilex™ FPGA IP Top Level Interfaces x
2.2.3.1. Clocks 2.2.3.2. Output Path 2.2.3.3. Input Path
2.2.3.1. Clocks x
2.2.3.1.1. Clock Frequency Relationships
2.2.3.2. Output Path x
2.2.3.2.1. Output Path Data Alignment
2.2.3.3. Input Path x
2.2.3.3.1. Input Path Data Alignment
2.2.4. Dynamic Reconfiguration x
2.2.4.1. Connectivity 2.2.4.2. Reconfiguration Features and Register Addressing 2.2.4.3. Dynamic Reconfiguration Guidelines
2.2.4.2. Reconfiguration Features and Register Addressing x
2.2.4.2.1. Control Registers Addresses 2.2.4.2.2. Control Registers
2.2.4.3. Dynamic Reconfiguration Guidelines x
2.2.4.3.1. Strobe Enable Window Calibration 2.2.4.3.2. Output and Strobe Enable Minimum and Maximum Phase Settings 2.2.4.3.3. Input DQ/DQS Delay Chains Maximum Values
2.3. Getting Started x
2.3.1. Parameter Settings 2.3.2. Signals
2.3.1. Parameter Settings x
2.3.1.1. Read Latency 2.3.1.2. Write Latency
2.3.2. Signals x
2.3.2.1. Clock and Reset Interface Signals 2.3.2.2. Output Path Signals 2.3.2.3. Input Path Signals
2.4. I/O Standards x
2.4.1. Input Buffer Reference Voltage (VREF) 2.4.2. On-Chip Termination (OCT)
2.4.2. On-Chip Termination (OCT) x
2.4.2.1. RZQ_GROUP Assignment
2.5. Design Guidelines x
2.5.1. Guidelines: Group Pin Placement 2.5.2. Reference Clock 2.5.3. Reset
2.6. Design Example x
2.6.1. Generate the Design Example
2.6.1. Generate the Design Example x
2.6.1.1. Design Example without Dynamic Reconfiguration 2.6.1.2. Dynamic Reconfiguration Design Examples
2.6.1.1. Design Example without Dynamic Reconfiguration x
2.6.1.1.1. Generate the Synthesis Design Example 2.6.1.1.2. Generate the Simulation Design Example
2.6.1.2. Dynamic Reconfiguration Design Examples x
2.6.1.2.1. Generate the Synthesis Design Example 2.6.1.2.2. Generate the Simulation Design Example
3. PHY Lite for Parallel Interfaces Intel Stratix 10 FPGA IP x
3.1. Release Information 3.2. Functional Description 3.3. Getting Started 3.4. I/O Standards 3.5. Design Guidelines 3.6. Design Example
3.2. Functional Description x
3.2.1. Top Level Interfaces 3.2.2. Clocks 3.2.3. Output Path 3.2.4. Input Path 3.2.5. Dynamic Reconfiguration
3.2.2. Clocks x
3.2.2.1. Clock Frequency Relationships
3.2.3. Output Path x
3.2.3.1. Output Path Data Alignment
3.2.4. Input Path x
3.2.4.1. Input Path Data Alignment
3.2.5. Dynamic Reconfiguration x
3.2.5.1. RTL Connectivity 3.2.5.2. Address Lookup 3.2.5.3. Reconfiguration Features and Register Addressing 3.2.5.4. Calibration Guidelines
3.2.5.1. RTL Connectivity x
3.2.5.1.1. Daisy Chain
3.2.5.2. Address Lookup x
3.2.5.2.1. Strobes 3.2.5.2.2. Parameter Table Examples
3.2.5.3. Reconfiguration Features and Register Addressing x
3.2.5.3.1. PHY Lite for Parallel Interfaces Intel Stratix 10 FPGA IP Control Registers Addresses 3.2.5.3.2. Control Registers Description
3.2.5.4. Calibration Guidelines x
3.2.5.4.1. Strobe Enable Window Calibration 3.2.5.4.2. Output and Strobe Enable Minimum and Maximum Phase Settings
3.3. Getting Started x
3.3.1. Parameter Settings 3.3.2. Signals
3.3.1. Parameter Settings x
3.3.1.1. Read Latency 3.3.1.2. Write Latency
3.3.2. Signals x
3.3.2.1. Clock and Reset Interface Signals 3.3.2.2. Output Path Signals 3.3.2.3. Input Path Signals 3.3.2.4. Avalon Configuration Bus Interface Signals 3.3.2.5. Termination Signals
3.4. I/O Standards x
3.4.1. Input Buffer Reference Voltage (VREF) 3.4.2. On-Chip Termination (OCT)
3.4.1. Input Buffer Reference Voltage (VREF) x
3.4.1.1. Calibrated VREF Settings
3.4.2. On-Chip Termination (OCT) x
3.4.2.1. RZQ_GROUP Assignment 3.4.2.2. Manual Insertion of OCT Block
3.5. Design Guidelines x
3.5.1. Guidelines: Group Pin Placement 3.5.2. Reference Clock 3.5.3. Reset 3.5.4. Constraining Multiple PHY Lite for Parallel Interfaces to One I/O Bank 3.5.5. Dynamic Reconfiguration 3.5.6. Timing
3.5.6. Timing x
3.5.6.1. Timing Components 3.5.6.2. Timing Constraints and Files 3.5.6.3. Timing Analysis 3.5.6.4. Timing Closure Guidelines
3.5.6.2. Timing Constraints and Files x
3.5.6.2.1. <variation_name>.sdc 3.5.6.2.2. <variation_name>_parameter.tcl 3.5.6.2.3. <variation_name>_ip_parameters.tcl 3.5.6.2.4. <variation_name>_pin_map.tcl 3.5.6.2.5. <variation_name>_report_timing.tcl 3.5.6.2.6. <variation_name>_report_timing_core.tcl
3.5.6.4. Timing Closure Guidelines x
3.5.6.4.1. Timing Closure: Dynamic Reconfiguration 3.5.6.4.2. Timing Closure: Input Strobe Setup and Hold Delay Constraints 3.5.6.4.3. Timing Closure: Output Strobe Setup and Hold Delay Constraints 3.5.6.4.4. Timing Closure: Non Edge-Aligned Input Data 3.5.6.4.5. I/O Timing Violation 3.5.6.4.6. Internal FPGA Path Timing Violation
3.6. Design Example x
3.6.1. Generate the Design Example
3.6.1. Generate the Design Example x
3.6.1.1. Design Example without Dynamic Reconfiguration 3.6.1.2. Dynamic Reconfiguration Design Examples
3.6.1.1. Design Example without Dynamic Reconfiguration x
3.6.1.1.1. Generate the Hardware Design Example 3.6.1.1.2. Generate the Simulation Design Example
3.6.1.2. Dynamic Reconfiguration Design Examples x
3.6.1.2.1. Dynamic Reconfiguration Using Finite State Machine
4. PHY Lite for Parallel Interfaces Intel Arria 10 and Intel Cyclone 10 GX FPGA IPs x
4.1. Release Information 4.2. Functional Description 4.3. Getting Started 4.4. I/O Standards 4.5. Design Guidelines 4.6. Design Example 4.7. Application Specific Design Example
4.2. Functional Description x
4.2.1. Top Level Interfaces 4.2.2. Clocks 4.2.3. Output Path 4.2.4. Input Path 4.2.5. Dynamic Reconfiguration
4.2.2. Clocks x
4.2.2.1. Clock Frequency Relationships
4.2.3. Output Path x
4.2.3.1. Output Path Data Alignment
4.2.4. Input Path x
4.2.4.1. Input Path Data Alignment
4.2.5. Dynamic Reconfiguration x
4.2.5.1. RTL Connectivity 4.2.5.2. Address Lookup 4.2.5.3. Reconfiguration Features and Register Addressing 4.2.5.4. Calibration Guidelines
4.2.5.1. RTL Connectivity x
4.2.5.1.1. Daisy Chain
4.2.5.2. Address Lookup x
4.2.5.2.1. Strobes 4.2.5.2.2. Parameter Table Examples
4.2.5.3. Reconfiguration Features and Register Addressing x
4.2.5.3.1. PHY Lite for Parallel Interfaces Intel Arria 10 FPGA IP and PHY Lite for Parallel Interfaces Intel Cyclone 10 GX IPs Address Registers 4.2.5.3.2. Control Registers Description
4.2.5.4. Calibration Guidelines x
4.2.5.4.1. Strobe Enable Window Calibration 4.2.5.4.2. Output and Strobe Enable Minimum and Maximum Phase Settings
4.3. Getting Started x
4.3.1. Parameter Settings 4.3.2. Signals
4.3.1. Parameter Settings x
4.3.1.1. Read Latency 4.3.1.2. Write Latency
4.3.2. Signals x
4.3.2.1. Clock and Reset Interface Signals 4.3.2.2. Output Path Signals 4.3.2.3. Input Path Signals 4.3.2.4. Avalon Configuration Bus Interface Signals 4.3.2.5. Termination Signals
4.4. I/O Standards x
4.4.1. Input Buffer Reference Voltage (VREF) 4.4.2. On-Chip Termination (OCT)
4.4.1. Input Buffer Reference Voltage (VREF) x
4.4.1.1. Calibrated VREF Settings
4.4.2. On-Chip Termination (OCT) x
4.4.2.1. RZQ_GROUP Assignment 4.4.2.2. Manual Insertion of OCT Block
4.5. Design Guidelines x
4.5.1. Guidelines: Group Pin Placement 4.5.2. Reference Clock 4.5.3. Reset 4.5.4. Constraining Multiple PHY Lite for Parallel Interfaces to One I/O Bank 4.5.5. Dynamic Reconfiguration 4.5.6. Timing
4.5.6. Timing x
4.5.6.1. Timing Components 4.5.6.2. Timing Constraints and Files 4.5.6.3. Timing Analysis 4.5.6.4. Timing Closure Guidelines
4.5.6.2. Timing Constraints and Files x
4.5.6.2.1. <variation_name>.sdc 4.5.6.2.2. <variation_name>_parameter.tcl 4.5.6.2.3. <variation_name>_ip_parameters.tcl 4.5.6.2.4. <variation_name>_pin_map.tcl 4.5.6.2.5. <variation_name>_report_timing.tcl 4.5.6.2.6. <variation_name>_report_timing_core.tcl
4.5.6.4. Timing Closure Guidelines x
4.5.6.4.1. Timing Closure: Dynamic Reconfiguration 4.5.6.4.2. Timing Closure: Input Strobe Setup and Hold Delay Constraints 4.5.6.4.3. Timing Closure: Output Strobe Setup and Hold Delay Constraints 4.5.6.4.4. Timing Closure: Non Edge-Aligned Input Data 4.5.6.4.5. I/O Timing Violation 4.5.6.4.6. Internal FPGA Path Timing Violation
4.6. Design Example x
4.6.1. Generate the Design Example
4.6.1. Generate the Design Example x
4.6.1.1. Design Example without Dynamic Reconfiguration 4.6.1.2. Dynamic Reconfiguration Design Examples
4.6.1.1. Design Example without Dynamic Reconfiguration x
4.6.1.1.1. Generate the Hardware Design Example 4.6.1.1.2. Generate the Simulation Design Example
4.6.1.2. Dynamic Reconfiguration Design Examples x
4.6.1.2.1. Dynamic Reconfiguration with Debug Kit 4.6.1.2.2. Dynamic Reconfiguration Using Finite State Machine
4.7. Application Specific Design Example x
4.7.1. Implementation using the PHY Lite for Parallel Interfaces IP
1. About the PHY Lite for Parallel Interfaces IP
2. PHY Lite for Parallel Interfaces Intel Agilex FPGA IP
3. PHY Lite for Parallel Interfaces Intel Stratix 10 FPGA IP
4. PHY Lite for Parallel Interfaces Intel Arria 10 and Intel Cyclone 10 GX FPGA IPs
5. PHY Lite for Parallel Interfaces Intel® FPGA IP User Guide Document Archives
6. Document Revision History for the PHY Lite for Parallel Interfaces IP User Guide

3.2.4.1. Input Path Data Alignment

The bus ordering of data_to_core, rdata_en, and rdata_valid is identical to the ordering of the output path. That is, the LSBs of the bus hold the first time slice of data received.

The rdata_valid delay is always set by the IP to match the rdata_en alignment. For example, quarter-rate delays are multiples of four external memory clock cycles (one quarter rate clock cycle).

Figure 36. Example Input (Quarter Rate DDR) - AlignedThe waveform shows an example of aligned reads on the input path of the PHY Lite for Parallel Interfaces IP. At the first rising edge of the core_clk_out signal, the group_0_rdata_en bus shows data of 4'hf, which represents all incoming data are aligned. The group_0_rdata_valid bus shows the data of 4'hf, which represents all incoming data are valid. Therefore, the incoming read data on the group_0_data_to_core bus matches the data seen on the group_0_data_io bus.


Reading from an unaligned memory address is called unaligned reads. Unaligned reads will result in unaligned rdata_valid and data_to_core with data and valid signals packed to the LSBs. This request causes the IP to do two or more read operations.

Figure 37. Example Input (Quarter Rate DDR) - UnalignedThe waveform shows an example of unaligned reads on the input path of the PHY Lite for Parallel Interfaces IP.

The data from an unaligned read operation comes in two phases. At the first rising edge of the core_clk_out signal, the group_0_rdata_en bus shows value of 4'he, which shows there are 6 bytes of incoming data from group_0_data_io bus. On the subsequent clock cycle, the group_0_rdata_en bus shows value of 4'h1, which shows there are 2 bytes of incoming data from group_0_data_io bus.

The valid data are transfer to the IP through the group_0_data_to_core bus. At first rising edge of the core_clk_out signal, group_0_rdata_valid bus shows a value of 4'h7, which represents the first 6 bytes of the data from the group_0_data_to_core bus are valid and the last 2 bytes are invalid. On the subsequent clock cycle, group_0_rdata_valid bus shows the value of 4'h1, which shows the last 2 bytes of the data from the group_0_data_to_core bus are valid.



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