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

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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

GPIO Intel® FPGA IP Data Paths

Figure 1.  High-Level View of Single-Ended GPIO


Table 2.   GPIO IP Core Data Path Modes
Data Path Register Mode
Bypass Simple Register DDR I/O
Full-Rate Half-Rate
Input Data goes from the delay element to the core, bypassing all double data rate I/Os (DDIOs). The full-rate DDIO operates as a simple register, bypassing half-rate DDIOs. The Fitter chooses whether to pack the register in the I/O or implement the register in the core, depending on the area and timing trade-offs. The full-rate DDIO operates as a regular DDIO, bypassing the half-rate DDIOs. The full-rate DDIO operates as a regular DDIO. The half-rate DDIOs convert full-rate data to half-rate data.
Output Data goes from the core straight to the delay element, bypassing all DDIOs. The full-rate DDIO operates as a simple register, bypassing half-rate DDIOs. The Fitter chooses whether to pack the register in the I/O or implement the register in the core, depending on the area and timing trade-offs. The full-rate DDIO operates as a regular DDIO, bypassing the half-rate DDIOs. The full-rate DDIO operates as a regular DDIO. The half-rate DDIOs convert full-rate data to half-rate data.
Bidirectional The output buffer drives both an output pin and an input buffer. The full-rate DDIO operates as a simple register. The output buffer drives both an output pin and an input buffer. The full-rate DDIO operates as a regular DDIO. The output buffer drives both an output pin and an input buffer. The input buffer drives a set of three flip-flops. The full-rate DDIO operates as a regular DDIO. The half-rate DDIOs convert full-rate data to half-rate. The output buffer drives both an output pin and an input buffer. The input buffer drives a set of three flip-flops.

If you use asynchronous clear and preset signals, all DDIOs share these same signals.

Half-rate and full-rate DDIOs connect to separate clocks. When you use half-rate and full-rate DDIOs, the full-rate clock must run at twice the half-rate frequency. You can use different phase relationships to meet timing requirements.


Section Content
Input Path
Output and Output Enable Paths

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