GPIO Intel® FPGA IP User Guide: Intel® Arria® 10 and Intel® Cyclone® 10 GX Devices

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ID 683136
Date 1/25/2022
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Document Table of Contents x
GPIO Intel® FPGA IP User Guide: Intel® Arria® 10 and Intel® Cyclone® 10 GX Devices
GPIO Intel® FPGA IP User Guide: Intel® Arria® 10 and Intel® Cyclone® 10 GX Devices x
Release Information for GPIO Intel® FPGA IP GPIO Intel® FPGA IP Features GPIO Intel® FPGA IP Data Paths GPIO Intel® FPGA IP Interface Signals Verifying Resource Utilization and Design Performance GPIO Intel® FPGA IP Parameter Settings Register Packing GPIO Intel® FPGA IP Timing GPIO Intel® FPGA IP Design Examples IP Migration Flow for Arria® V, Cyclone® V, and Stratix® V Devices GPIO Intel® FPGA IP User Guide Archives Document Revision History for GPIO Intel® FPGA IP User Guide: Intel® Arria® 10 and Intel® Cyclone® 10 GX Devices
GPIO Intel® FPGA IP Data Paths x
Input Path Output and Output Enable Paths
GPIO Intel® FPGA IP Interface Signals x
Shared Signals Data Bit-Order for Data Interface Input and Output Bus High and Low Bits Data Interface Signals and Corresponding Clocks
GPIO Intel® FPGA IP Timing x
Timing Components Delay Elements Timing Analysis Timing Closure Guidelines
Timing Analysis x
Single Data Rate Input Register Full-Rate or Half-Rate DDIO Input Register Single Data Rate Output Register Full-Rate or Half-Rate DDIO Output Register
GPIO Intel® FPGA IP Design Examples x
GPIO IP Core Synthesizable Intel® Quartus® Prime Design Example GPIO IP Core Simulation Design Example
IP Migration Flow for Arria® V, Cyclone® V, and Stratix® V Devices x
Migrating Your ALTDDIO_IN, ALTDDIO_OUT, ALTDDIO_BIDIR, and ALTIOBUF IP Cores Guideline: Swap datain_h and datain_l Ports in Migrated IP
GPIO Intel® FPGA IP User Guide: Intel® Arria® 10 and Intel® Cyclone® 10 GX Devices

Data Bit-Order for Data Interface

Figure 9. Data Bit-Order ConventionThis figure shows the bit-order convention for the din, dout and oe data signals.


  • If the data bus size value is SIZE, the LSB is at the right-most position.
  • If the data bus size value is 2 × SIZE, the bus is made of two words of SIZE .
  • If the data bus size value 4 × SIZE, the bus is made of four words of SIZE.
  • The LSB is in the right-most position of each word.
  • The right-most word specifies the first word going out for output buses and the first word coming in for input buses.
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