JESD204C Intel® FPGA IP User Guide

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ID 683108
Date 6/26/2023
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Document Table of Contents
Document Table of Contents x
1. About the JESD204C Intel FPGA IP User Guide 2. Overview of the JESD204C Intel FPGA IP 3. Functional Description 4. Getting Started 5. Designing with the JESD204C Intel® FPGA IP 6. JESD204C Intel® FPGA IP Parameters 7. Interface Signals 8. Control and Status Registers 9. JESD204C Intel® FPGA IP User Guide Archives 10. Document Revision History for the JESD204C Intel® FPGA IP User Guide
2. Overview of the JESD204C Intel FPGA IP x
2.1. Release Information 2.2. Device Family Support 2.3. JESD204C Intel® FPGA IP Features 2.4. Presets 2.5. Performance and Resource Utilization
3. Functional Description x
3.1. Clocks 3.2. Local Extended Multiblock Clock 3.3. CRC Encoding/Decoding 3.4. Scrambler/Descrambler
3.1. Clocks x
3.1.1. Device Clock 3.1.2. Frame Clock and Link Clock
3.2. Local Extended Multiblock Clock x
3.2.1. LEMC Counter
4. Getting Started x
4.1. Installing and Licensing Intel® FPGA IP Cores 4.2. Intel® FPGA IP Evaluation Mode 4.3. IP Catalog and Parameter Editor 4.4. JESD204C IP Component Files 4.5. Creating a New Intel® Quartus® Prime Project 4.6. Parameterizing and Generating the IP 4.7. Compiling the JESD204C IP Design 4.8. Programming an FPGA Device
5. Designing with the JESD204C Intel® FPGA IP x
5.1. JESD204C TX and RX Reset Sequence 5.2. Configuration Phase 5.3. Link Reinitialization 5.4. SYSREF Sampling 5.5. Interrupt and Error Handling 5.6. Deterministic Latency
5.5. Interrupt and Error Handling x
5.5.1. Interrupt Configuration for TX and RX 5.5.2. Interrupt Top Half ISR Handler 5.5.3. Interrupt Bottom Half ISR Handler
7. Interface Signals x
7.1. Transmitter Signals 7.2. Receiver Signals
8. Control and Status Registers x
8.1. Transmitter Registers 8.2. Receiver Registers
1. About the JESD204C Intel FPGA IP User Guide
2. Overview of the JESD204C Intel FPGA IP
3. Functional Description
4. Getting Started
5. Designing with the JESD204C Intel® FPGA IP
6. JESD204C Intel® FPGA IP Parameters
7. Interface Signals
8. Control and Status Registers
9. JESD204C Intel® FPGA IP User Guide Archives
10. Document Revision History for the JESD204C Intel® FPGA IP User Guide

5.5. Interrupt and Error Handling

The JESD204C IP interrupts the processor when there are errors or reinitialization requests in the design. The interrupts are peripheral and level sensitive.

The IP holds a level-sensitive interrupt signal asserted until the peripheral deasserts the interrupt signal. When the level-sensitive interrupt is high, the state of the interrupt in the Interrupt Controller is pending or active pending. If the peripheral deasserts the interrupt signal for any reason, the Interrupt Controller removes the pending state from the interrupt.

Every error condition in the JESD204C IP latches on the error status and keeps the interrupt signal asserted until the error is serviced and the ISR writes a 1 to clear the error status.

When interrupt is asserted and fulfills the Interrupt Controller configuration (for example, priority, interrupt IDs), the processor jumps to the Interrupt Service Routine (ISR) to execute the routine.

The ISR must service the requirements of the JESD204C IP by reading the error status and then clearing the interrupt, so that the JESD204C IP could deassert the interrupt. This is particularly important for level-sensitive interrupts, where ISR must ensure that the interrupt is deasserted at the Interrupt Controller input before proceeding to the next step. Typically, this is called the top half ISR handler.

The bottom half ISR handler may require a chain of events.


Section Content
Interrupt Configuration for TX and RX
Interrupt Top Half ISR Handler
Interrupt Bottom Half ISR Handler

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