Intel® Stratix® 10 General Purpose I/O User Guide

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ID 683518
Date 7/07/2021
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Document Table of Contents
Document Table of Contents x
1. Intel® Stratix® 10 I/O Overview 2. Intel® Stratix® 10 I/O Architecture and Features 3. Intel® Stratix® 10 I/O Design Considerations 4. Intel® Stratix® 10 I/O Implementation Guides 5. GPIO Intel® FPGA IP Reference 6. Intel® Stratix® 10 General Purpose I/O User Guide Archives 7. Document Revision History for Intel® Stratix® 10 General Purpose I/O User Guide
1. Intel® Stratix® 10 I/O Overview x
1.1. Intel® Stratix® 10 I/O and Differential I/O Buffers 1.2. Intel® Stratix® 10 I/O Migration Support
2. Intel® Stratix® 10 I/O Architecture and Features x
2.1. I/O Standards and Voltage Levels in Intel® Stratix® 10 Devices 2.2. I/O Element Structure in Intel® Stratix® 10 Devices 2.3. Programmable IOE Features in Intel® Stratix® 10 Devices 2.4. On-Chip I/O Termination in Intel® Stratix® 10 Devices 2.5. External I/O Termination for Intel® Stratix® 10 Devices
2.1. I/O Standards and Voltage Levels in Intel® Stratix® 10 Devices x
2.1.1. Intel® Stratix® 10 I/O Standards Support 2.1.2. Intel® Stratix® 10 I/O Standards Voltage Support
2.2. I/O Element Structure in Intel® Stratix® 10 Devices x
2.2.1. I/O Bank Architecture in Intel® Stratix® 10 Devices 2.2.2. I/O Buffer and Registers in Intel® Stratix® 10 Devices
2.3. Programmable IOE Features in Intel® Stratix® 10 Devices x
2.3.1. Programmable Output Slew Rate Control 2.3.2. Programmable IOE Delay 2.3.3. Programmable Open-Drain Output 2.3.4. Programmable Bus Hold 2.3.5. Programmable Pull-Up Resistor 2.3.6. Programmable Pre-Emphasis 2.3.7. Programmable Differential Output Voltage 2.3.8. Programmable Current Strength
2.4. On-Chip I/O Termination in Intel® Stratix® 10 Devices x
2.4.1. RS OCT without Calibration in Intel® Stratix® 10 Devices 2.4.2. RS OCT with Calibration in Intel® Stratix® 10 Devices 2.4.3. RT OCT with Calibration in Intel® Stratix® 10 Devices 2.4.4. Dynamic OCT 2.4.5. Differential Input RD OCT 2.4.6. OCT Calibration Block in Intel® Stratix® 10 Devices
2.5. External I/O Termination for Intel® Stratix® 10 Devices x
2.5.1. Single-Ended I/O Termination 2.5.2. Differential I/O Termination for Intel® Stratix® 10 Devices
2.5.2. Differential I/O Termination for Intel® Stratix® 10 Devices x
2.5.2.1. Differential HSTL, SSTL, HSUL, and POD Termination 2.5.2.2. LVDS, RSDS, and Mini-LVDS Termination 2.5.2.3. LVPECL Termination
3. Intel® Stratix® 10 I/O Design Considerations x
3.1. Guideline: VREF Sources and VREF Pins 3.2. Guideline: Observe Device Absolute Maximum Rating for 3.0 V Interfacing 3.3. Guideline: Voltage-Referenced and Non-Voltage Referenced I/O Standards 3.4. Guideline: Do Not Drive I/O Pins During Power Sequencing 3.5. Guideline: Intel® Stratix® 10 I/O Buffer During Power Up, Configuration, and Power Down 3.6. Guideline: Maximum DC Current Restrictions 3.7. Guideline: Use Only One Voltage for All 3 V I/O Banks 3.8. Guideline: I/O Standards Limitation for Intel® Stratix® 10 TX 400 3.9. Guideline: I/O Standards Limitation for Intel® Stratix® 10 GX 400 and SX 400
4. Intel® Stratix® 10 I/O Implementation Guides x
4.1. GPIO Intel® FPGA IP 4.2. Verifying Resource Utilization and Design Performance 4.3. GPIO Intel® FPGA IP Timing 4.4. GPIO Intel® FPGA IP Design Examples 4.5. Verifying Pin Migration Compatibility 4.6. IP Migration to the GPIO IP Core
4.1. GPIO Intel® FPGA IP x
4.1.1. Release Information for GPIO Intel® FPGA IP 4.1.2. GPIO Intel® FPGA IP Data Paths 4.1.3. Register Packing
4.1.2. GPIO Intel® FPGA IP Data Paths x
4.1.2.1. Input Path 4.1.2.2. Output and Output Enable Paths
4.3. GPIO Intel® FPGA IP Timing x
4.3.1. Timing Components 4.3.2. Delay Elements 4.3.3. Timing Analysis 4.3.4. Timing Closure Guidelines
4.3.3. Timing Analysis x
4.3.3.1. Single Data Rate Input Register 4.3.3.2. Full-Rate or Half-Rate DDIO Input Register 4.3.3.3. Single Data Rate Output Register 4.3.3.4. Full-Rate or Half-Rate DDIO Output Register
4.4. GPIO Intel® FPGA IP Design Examples x
4.4.1. GPIO IP Core Synthesizable Intel® Quartus® Prime Design Example 4.4.2. GPIO IP Core Simulation Design Example
4.6. IP Migration to the GPIO IP Core x
4.6.1. Migrating Your ALTDDIO_IN, ALTDDIO_OUT, ALTDDIO_BIDIR, and ALTIOBUF IP Cores 4.6.2. Guideline: Swap datain_h and datain_l Ports in Migrated IP
5. GPIO Intel® FPGA IP Reference x
5.1. GPIO Intel® FPGA IP Parameter Settings 5.2. GPIO Intel® FPGA IP Interface Signals
5.2. GPIO Intel® FPGA IP Interface Signals x
5.2.1. Shared Signals 5.2.2. Data Bit-Order for Data Interface 5.2.3. Data Interface Signals and Corresponding Clocks
1. Intel® Stratix® 10 I/O Overview
2. Intel® Stratix® 10 I/O Architecture and Features
3. Intel® Stratix® 10 I/O Design Considerations
4. Intel® Stratix® 10 I/O Implementation Guides
5. GPIO Intel® FPGA IP Reference
6. Intel® Stratix® 10 General Purpose I/O User Guide Archives
7. Document Revision History for Intel® Stratix® 10 General Purpose I/O User Guide

2.3.8. Programmable Current Strength

You can use the programmable current strength to mitigate the effects of high signal attenuation that is caused by a long transmission line or a legacy backplane.
Note:

To use programmable current strength, you must specify the current strength assignment in the Intel® Quartus® Prime software. Without explicit assignments, the Intel® Quartus® Prime software uses these predefined default values:

  • All HSTL and SSTL Class I, and all non-voltage-referenced I/O standards—50 Ω RS OCT without calibration
  • All HSTL and SSTL Class II I/O standards—25 Ω RS OCT without calibration
  • POD12 I/O standard—34 Ω RS OCT without calibration
Table 8.  Programmable Current Strength Settings for Intel® Stratix® 10 DevicesThe output buffer for each Intel® Stratix® 10 device I/O pin has a programmable current strength control for the I/O standards listed in this table.
I/O Standard

IOH / IOL Current Strength Setting (mA)

Supported in FPGA

Supported in HPS 12

(SoC Devices Only)
Available Default Available Default
3.3 V LVTTL 13 12, 8, 4 12 — —
3.3 V LVCMOS13 12, 8, 4 12 — —
3.0 V LVTTL 3.3 V I/O bank13 12, 8, 4 12 — —
3 V I/O bank 14 24, 20, 16, 12, 8, 4
3.0 V LVCMOS 3.3 V I/O bank13 12, 8, 4 12 — —
3 V I/O bank14 24, 20, 16, 12, 8, 4
2.5 V LVCMOS 16, 12, 8, 4 12 — —
1.8 V LVCMOS 16, 12, 10, 8, 6, 4, 2 12 12, 10, 8 12
1.5 V LVCMOS 12, 10, 8, 6, 4, 2 12 — —
1.2 V LVCMOS 8, 6, 4, 2 8 — —
SSTL-18 Class I 8, 6, 4 8 — —
SSTL-18 Class II 8 8 — —
SSTL-15 Class I 8, 6, 4 8 — —
SSTL-15 Class II 8 8 — —
SSTL-135 8, 6, 4 8 — —
SSTL-125 8, 6, 4 8 — —
SSTL-12 8, 6, 4 8 — —
POD12 8, 6, 4 8 — —
1.8 V HSTL Class I 12, 10, 8, 6, 4 8 — —
1.8 V HSTL Class II 14 14 — —
1.5 V HSTL Class I 12, 10, 8, 6, 4 8 — —
1.5 V HSTL Class II 14 14 — —
1.2 V HSTL Class I 8, 6, 4 8 — —
Differential SSTL-18 Class I 8, 6, 4 8 — —
Differential SSTL-18 Class II 8 8 — —
Differential SSTL-15 Class I 8, 6, 4 8 — —
Differential SSTL-15 Class II 8 8 — —
Differential SSTL-135 12, 10, 8, 6, 4 8 — —
Differential SSTL-125 12, 10, 8, 6, 4 8 — —
Differential SSTL-12 Class I 12, 10, 8, 6, 4 8 — —
Differential POD12 8, 6, 4 8 — —
Differential 1.8 V HSTL Class I 12, 10, 8, 6, 4 8 — —
Differential 1.8 V HSTL Class II 14 14 — —
Differential 1.5 V HSTL Class I 12, 10, 8, 6, 4 8 — —
Differential 1.5 V HSTL Class II 14 14 — —
Differential 1.2 V HSTL Class I 8, 6, 4 8 — —
Note: Intel recommends that you perform IBIS or SPICE simulations to determine the best current strength setting for your specific application.
Related Information
12 The programmable current strength information for the HPS is preliminary.
13 Available only on I/O bank 3C of the HF35 package of the Intel® Stratix® 10 GX 400 and SX 400 devices. The current strength setting control is per eight-pin groups basis. To identify the pin groups, refer to the Optional Function(s) column in device pin out files. For example, the group name is IO33_LS[<group index>]_[<pin index>].
14 Programmable slew rate control is applicable only for current strength settings of 16 mA and above.
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