Stratix® 10 High-Speed LVDS I/O User Guide

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ID 683792
Date 7/08/2024
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Document Table of Contents
Document Table of Contents x
1. Stratix® 10 High-Speed LVDS I/O Overview 2. Stratix® 10 High-Speed LVDS I/O Architecture and Features 3. Stratix 10 High-Speed LVDS I/O Design Considerations 4. Stratix® 10 High-Speed LVDS I/O Implementation Guides 5. LVDS SERDES Intel® FPGA IP References 6. Stratix® 10 High-Speed LVDS I/O User Guide Archives 7. Document Revision History for the Stratix® 10 High-Speed LVDS I/O User Guide
1. Stratix® 10 High-Speed LVDS I/O Overview x
1.1. Stratix® 10 LVDS SERDES Usage Modes 1.2. Stratix® 10 LVDS Channels Support 1.3. Stratix® 10 GPIO Banks, SERDES, and DPA Locations
2. Stratix® 10 High-Speed LVDS I/O Architecture and Features x
2.1. Stratix® 10 LVDS SERDES I/O Standards Support 2.2. LVDS Transmitter Programmable I/O Features 2.3. SERDES Circuitry 2.4. Differential Transmitter in Stratix® 10 Devices 2.5. Differential Receiver in Stratix® 10 Devices
2.2. LVDS Transmitter Programmable I/O Features x
2.2.1. Programmable Pre-Emphasis 2.2.2. Programmable Differential Output Voltage
2.4. Differential Transmitter in Stratix® 10 Devices x
2.4.1. Transmitter Blocks in Stratix® 10 Devices 2.4.2. Serializer Bypass for DDR and SDR Operations
2.5. Differential Receiver in Stratix® 10 Devices x
2.5.1. Receiver Blocks in Stratix® 10 Devices 2.5.2. Receiver Modes in Stratix® 10 Devices
2.5.1. Receiver Blocks in Stratix® 10 Devices x
2.5.1.1. DPA Block 2.5.1.2. Synchronizer 2.5.1.3. Data Realignment Block (Bit Slip) 2.5.1.4. Deserializer
2.5.2. Receiver Modes in Stratix® 10 Devices x
2.5.2.1. Non-DPA Mode 2.5.2.2. DPA Mode 2.5.2.3. Soft-CDR Mode
3. Stratix 10 High-Speed LVDS I/O Design Considerations x
3.1. PLLs and Clocking for Stratix® 10 Devices 3.2. Source-Synchronous Timing Budget 3.3. Guideline: LVDS SERDES IP Core Instantiation 3.4. Guideline: LVDS SERDES Pin Pairs for Soft-CDR Mode 3.5. Guideline: LVDS Transmitters and Receivers in the Same I/O Bank 3.6. Guideline: LVDS SERDES Limitation for Stratix® 10 GX 400, SX 400, and TX 400
3.1. PLLs and Clocking for Stratix® 10 Devices x
3.1.1. Clocking Differential Transmitters 3.1.2. Clocking Differential Receivers 3.1.3. Guideline: LVDS Reference Clock Source 3.1.4. Guideline: Use PLLs in Integer PLL Mode for LVDS 3.1.5. Guideline: Use High-Speed Clock from PLL to Clock LVDS SERDES Only 3.1.6. Guideline: Pin Placement for Differential Channels 3.1.7. LVDS Interface with External PLL Mode
3.1.6. Guideline: Pin Placement for Differential Channels x
3.1.6.1. PLLs Driving Differential Transmitter Channels 3.1.6.2. PLLs Driving DPA-Enabled Differential Receiver Channels 3.1.6.3. PLLs Driving DPA-Enabled Differential Receiver and Transmitter Channels in LVDS Interface Spanning Multiple I/O Banks
3.1.7. LVDS Interface with External PLL Mode x
3.1.7.1. IOPLL IP Signal Interface with LVDS SERDES IP 3.1.7.2. IOPLL Parameter Values for External PLL Mode 3.1.7.3. Connection between IOPLL IP and LVDS SERDES IP in External PLL Mode
3.2. Source-Synchronous Timing Budget x
3.2.1. Differential Data Orientation 3.2.2. Differential I/O Bit Position 3.2.3. Transmitter Channel-to-Channel Skew 3.2.4. Receiver Skew Margin for Non-DPA Mode
3.2.2. Differential I/O Bit Position x
3.2.2.1. Differential Bit Naming Conventions
3.2.4. Receiver Skew Margin for Non-DPA Mode x
3.2.4.1. RSKM Equation 3.2.4.2. Example: RSKM Calculation
3.5. Guideline: LVDS Transmitters and Receivers in the Same I/O Bank x
3.5.1. Using the Duplex Feature 3.5.2. Using an External PLL
4. Stratix® 10 High-Speed LVDS I/O Implementation Guides x
4.1. LVDS SERDES Intel® FPGA IP 4.2. LVDS SERDES IP Initialization and Reset 4.3. LVDS SERDES Intel® FPGA IP Timing 4.4. LVDS SERDES Intel® FPGA IP Design Examples 4.5. IP Migration Flow for Arria® V, Cyclone® V, and Stratix® V Devices
4.1. LVDS SERDES Intel® FPGA IP x
4.1.1. Release Information 4.1.2. LVDS SERDES Intel® FPGA IP Features 4.1.3. LVDS SERDES IP Core Functional Modes 4.1.4. LVDS SERDES IP Core Functional Description
4.1.4. LVDS SERDES IP Core Functional Description x
4.1.4.1. Serializer 4.1.4.2. DPA FIFO 4.1.4.3. Bitslip 4.1.4.4. Deserializer 4.1.4.5. Clock Phase Alignment
4.2. LVDS SERDES IP Initialization and Reset x
4.2.1. Initializing the LVDS SERDES IP in Non-DPA Mode 4.2.2. Initializing the LVDS SERDES IP in DPA Mode 4.2.3. Resetting the DPA 4.2.4. Word Boundaries Alignment
4.2.4. Word Boundaries Alignment x
4.2.4.1. Aligning Word Boundaries
4.3. LVDS SERDES Intel® FPGA IP Timing x
4.3.1. I/O Timing Analysis 4.3.2. FPGA Timing Analysis 4.3.3. Timing Analysis for the External PLL Mode 4.3.4. Timing Closure Guidelines for Internal FPGA Paths 4.3.5. Guideline: Use Clock Phase Alignment Block to Improve Timing Closure
4.3.1. I/O Timing Analysis x
4.3.1.1. Obtaining RSKM Report 4.3.1.2. Obtaining TCCS Report
4.4. LVDS SERDES Intel® FPGA IP Design Examples x
4.4.1. LVDS SERDES IP Synthesizable Quartus® Prime Design Examples 4.4.2. LVDS SERDES IP Simulation Design Example 4.4.3. Combined LVDS SERDES IP Transmitter and Receiver Design Example 4.4.4. LVDS SERDES IP Dynamic Phase Shift Design Example
4.5. IP Migration Flow for Arria® V, Cyclone® V, and Stratix® V Devices x
4.5.1. Migrating Your ALTLVDS_TX and ALTLVDS_RX IP Cores
5. LVDS SERDES Intel® FPGA IP References x
5.1. LVDS SERDES Intel® FPGA IP Parameter Settings 5.2. LVDS SERDES Intel® FPGA IP Signals 5.3. Comparison of LVDS SERDES Intel® FPGA IP with Stratix® V SERDES
5.1. LVDS SERDES Intel® FPGA IP Parameter Settings x
5.1.1. LVDS SERDES Intel® FPGA IP General Settings 5.1.2. LVDS SERDES Intel® FPGA IP PLL Settings 5.1.3. LVDS SERDES Intel® FPGA IP Receiver Settings 5.1.4. LVDS SERDES Intel® FPGA IP Transmitter Settings 5.1.5. LVDS SERDES IP Core Clock Resource Summary
5.1.3. LVDS SERDES Intel® FPGA IP Receiver Settings x
5.1.3.1. Receiver Input Clock Parameters Setup
5.1.4. LVDS SERDES Intel® FPGA IP Transmitter Settings x
5.1.4.1. Setting the Transmitter Output Clock Parameters
1. Stratix® 10 High-Speed LVDS I/O Overview
2. Stratix® 10 High-Speed LVDS I/O Architecture and Features
3. Stratix 10 High-Speed LVDS I/O Design Considerations
4. Stratix® 10 High-Speed LVDS I/O Implementation Guides
5. LVDS SERDES Intel® FPGA IP References
6. Stratix® 10 High-Speed LVDS I/O User Guide Archives
7. Document Revision History for the Stratix® 10 High-Speed LVDS I/O User Guide

3.1.7.2. IOPLL Parameter Values for External PLL Mode

These examples show the clocking requirements to generate output clocks for LVDS SERDES IP using the IOPLL IP. The examples set the phase shift with the assumption that the clock and data are edge-aligned at the pins of the device.
Note: For other clock and data phase relationships, Altera recommends that you first instantiate your LVDS SERDES IP interface without using the external PLL mode option. Compile the IPs in the Quartus® Prime software and take note of the frequency, phase shift, and duty cycle settings for each clock output. Enter these settings in the IOPLL IP parameter editor and then connect the appropriate output to the LVDS SERDES IPs.
Table 11.  Example: Generating Output Clocks Using an IOPLL IP (Receiver in Non-DPA Mode)This table lists the parameter values that you can set in the IOPLL IP parameter editor to generate three output clocks using an IOPLL IP if you are using the non-DPA receiver.
Parameter

outclk0

(Connects as lvds_clk[0] to the ext_fclk port of LVDS SERDES IP transmitter or receiver)

outclk1

(Connects as loaden[0] to the ext_loaden port of LVDS SERDES IP transmitter or receiver)

outclk4 3

(Used as the core clock for the parallel data registers for both transmitter and receiver, and connects to the ext_coreclock port of LVDS SERDES IP)

Frequency

data rate

data rate/serialization factor

data rate/serialization factor
Phase shift

180°

[(deserialization factor – 1)/deserialization factor] × 360°

180/serialization factor

(outclk0 phase shift divided by the serialization factor)

Duty cycle

50%

100/serialization factor

50%

The calculations for phase shift, using the RSKM equation, assume that the input clock and serial data are edge aligned. Introducing a phase shift of 180° to sampling clock (outclk0) ensures that the input data is center-aligned with respect to the outclk0, as shown in the following figure.

Figure 23. Phase Relationship for External PLL Interface Signals


Table 12.  Example: Generating Output Clocks Using an IOPLL IP (Receiver in DPA or Soft-CDR Mode)This table lists the parameter values that you can set in the IOPLL IP parameter editor to generate four output clocks using an IOPLL IP if you are using the DPA or soft-CDR receiver.
Parameter

outclk0

(Connects as lvds_clk[0] to the ext_fclk port of LVDS SERDES IP transmitter or receiver)

outclk1

(Connects as loaden[0] to the ext_loaden port of LVDS SERDES IP transmitter or receiver)

Not required for the soft-CDR receiver.

outclk4 3

(Used as the core clock for the parallel data registers for both transmitter and receiver, and connects to the ext_coreclock port of LVDS SERDES IP)

VCO Frequency

(Connects as phout[7:0] to the ext_vcoph[7:0] port of LVDS SERDES IP)

Frequency

data rate

data rate/serialization factor

data rate/serialization factor

Use the value recommended by the LVDS and IOPLL IPs
Phase shift

180°

[(deserialization factor – 1)/deserialization factor] × 360°

180/serialization factor

(outclk0 phase shift divided by the serialization factor)

—
Duty cycle

50%

100/serialization factor

50%

—
Table 13.   Example: Generating Output Clocks Using a Shared IOPLL IP for Transmitter Spanning Multiple Banks Shared with Receiver Channels (Receiver in DPA or Soft-CDR Mode) This table lists the parameter values that you can set in the IOPLL IP parameter editor to generate six output clocks using an IOPLL IP. Use these settings if you use transmitter channels that span multiple banks shared with receiver channels in DPA or soft-CDR mode.
Parameter

outclk0

(Connects as lvds_clk[0] to the ext_fclk port of LVDS SERDES IP receiver)

outclk1

(Connects as loaden[0] to the ext_loaden port of LVDS SERDES IP receiver)

Not required for the soft-CDR receiver.

outclk4 3

(Used as the core clock for the parallel data registers for both transmitter and receiver, and connects to the ext_coreclock port of LVDS SERDES IP)

VCO Frequency

(Connects as phout[7:0] to the ext_vcoph[7:0] ports of LVDS SERDES IP)

outclk2

(Connects as lvds_clk[1] to the ext_fclk port of LVDS SERDES IP transmitter)

outclk3

(Connects as loaden[1] to the ext_loaden port of LVDS SERDES IP transmitter)

Frequency

data rate

data rate/serialization factor

data rate/serialization factor

data rate
Phase shift

180°

[(deserialization factor – 1)/deserialization factor] × 360°

180/serialization factor

(outclk0 phase shift divided by the serialization factor)

—
Duty cycle

50%

100/serialization factor

50%

—
Related Information
3 Not required if your turn on Use the CPA block for improved periphery-core timing.
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