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

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ID 683751
Date 1/27/2022
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Document Table of Contents
Document Table of Contents x
1. Intel® MAX® 10 I/O Overview 2. Intel® MAX® 10 I/O Architecture and Features 3. Intel® MAX® 10 I/O Design Considerations 4. Intel® MAX® 10 I/O Implementation Guides 5. GPIO Lite Intel® FPGA IP References 6. Intel® MAX® 10 General Purpose I/O User Guide Archives 7. Document Revision History for Intel® MAX® 10 General Purpose I/O User Guide
1. Intel® MAX® 10 I/O Overview x
1.1. Intel® MAX® 10 Devices I/O Resources Per Package 1.2. Intel® MAX® 10 I/O Vertical Migration Support
2. Intel® MAX® 10 I/O Architecture and Features x
2.1. Intel® MAX® 10 I/O Standards Support 2.2. Intel® MAX® 10 I/O Elements 2.3. Intel® MAX® 10 I/O Buffers 2.4. I/O Standards Termination
2.1. Intel® MAX® 10 I/O Standards Support x
2.1.1. Intel® MAX® 10 I/O Standards Voltage and Pin Support
2.2. Intel® MAX® 10 I/O Elements x
2.2.1. Intel® MAX® 10 I/O Banks Architecture 2.2.2. Intel® MAX® 10 I/O Banks Performance 2.2.3. Intel® MAX® 10 I/O Banks Locations
2.3. Intel® MAX® 10 I/O Buffers x
2.3.1. Schmitt-Trigger Input Buffer 2.3.2. Programmable I/O Buffer Features
2.3.2. Programmable I/O Buffer Features x
2.3.2.1. Programmable Open Drain 2.3.2.2. Programmable Bus Hold 2.3.2.3. Programmable Pull-Up Resistor 2.3.2.4. Programmable Current Strength 2.3.2.5. Programmable Output Slew Rate Control 2.3.2.6. Programmable IOE Delay 2.3.2.7. PCI Clamp Diode 2.3.2.8. Programmable Pre-Emphasis 2.3.2.9. Programmable Differential Output Voltage 2.3.2.10. Programmable Emulated Differential Output 2.3.2.11. Programmable Dynamic Power Down
2.4. I/O Standards Termination x
2.4.1. Voltage-Referenced I/O Standards Termination 2.4.2. Differential I/O Standards Termination 2.4.3. Intel® MAX® 10 On-Chip I/O Termination
2.4.3. Intel® MAX® 10 On-Chip I/O Termination x
2.4.3.1. OCT Calibration 2.4.3.2. RS OCT in Intel® MAX® 10 Devices
3. Intel® MAX® 10 I/O Design Considerations x
3.1. Guidelines: VCCIO Range Considerations 3.2. Guidelines: Voltage-Referenced I/O Standards Restriction 3.3. Guidelines: Enable Clamp Diode for LVTTL/LVCMOS Input Buffers 3.4. Guidelines: Adhere to the LVDS I/O Restrictions Rules 3.5. Guidelines: I/O Restriction Rules 3.6. Guidelines: Placement Restrictions for 1.0 V I/O Pin 3.7. Guidelines: Analog-to-Digital Converter I/O Restriction 3.8. Guidelines: External Memory Interface I/O Restrictions 3.9. Guidelines: Dual-Purpose Configuration Pin 3.10. Guidelines: Clock and Data Input Signal for Intel® MAX® 10 E144 Package
3.6. Guidelines: Placement Restrictions for 1.0 V I/O Pin x
3.6.1. Calculating the Total Inductance for 1.0 V Pin Placement
4. Intel® MAX® 10 I/O Implementation Guides x
4.1. GPIO Lite Intel FPGA IP GPIO Lite Intel® FPGA IP 4.2. Verifying Pin Migration Compatibility
4.1. GPIO Lite Intel FPGA IP GPIO Lite Intel® FPGA IP x
4.1.1. GPIO Lite Intel® FPGA IP Data Paths
4.1.1. GPIO Lite Intel® FPGA IP Data Paths x
4.1.1.1. DDR Input Path 4.1.1.2. DDR Output Path with Output Enable
5. GPIO Lite Intel® FPGA IP References x
5.1. GPIO Lite Intel® FPGA IP Parameter Settings 5.2. GPIO Lite Intel® FPGA IP Interface Signals
1. Intel® MAX® 10 I/O Overview
2. Intel® MAX® 10 I/O Architecture and Features
3. Intel® MAX® 10 I/O Design Considerations
4. Intel® MAX® 10 I/O Implementation Guides
5. GPIO Lite Intel® FPGA IP References
6. Intel® MAX® 10 General Purpose I/O User Guide Archives
7. Document Revision History for Intel® MAX® 10 General Purpose I/O User Guide

3.3. Guidelines: Enable Clamp Diode for LVTTL/LVCMOS Input Buffers

If the input voltage to the LVTTL/LVCMOS input buffers is higher than the VCCIO of the I/O bank, Intel recommends that you enable the clamp diode.
  • 3.3 V LVCMOS/LVTTL input buffers—enable clamp diode if VCCIO of the I/O bank is 3.0 V.
  • 3.3 V or 3.0 V LVCMOS/LVTTL input buffers—enable clamp diode if VCCIO of the I/O bank is 2.5 V.

By enabling the clamp diode under these conditions, you limit overshoot. However, this does not comply with hot socket current specification.

If you do not enable the clamp diode under these conditions, the signal integrity for the I/O pin is impacted and there will be overshoot problem. In this situation, you must ensure that your board design conforms to the overshoot specifications.

Table 14.  Voltage Tolerance Maximum Ratings for 3.3 V or 3.0 VThis table lists the voltage tolerance specifications. Ensure that your board design conforms to these specifications if you do not want to follow the clamp diode recommendation.
Voltage Minimum (V) Maximum (V)
VCCIO = 3.3 V 3.135 3.45
VCCIO = 3.0 V 2.85 3.15
VIH (AC) — 4.1
VIH (DC) — 3.6
VIL (DC) –0.3 0.8
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