Recent Content
altera scfifo ip with power-up initial value
in the quartus 25.3 with agilex7, I can see the retiming restriction about scfifo power-up initial value in the retiming rpt. from the altera user guide, the scfifo sclr must be asserted by user logic during power-up, so can I enable the setting ignore_power_up_initial_value to fix retiming restriction without any side effect?7Views0likes0CommentsRegarding data for the Altera Arria V GX FPGA development kit
I am looking for information on an Altera Arria V evaluation board that is equipped with the SFP module. I think that Arria V GX FPGA Development Kit is the relevant product. However, when I check the links below, I see “Error 404: Page Not Found.” Are the following links incorrect? Arria V GX FPGA Development Board Reference Manual (English, PDF) http://www.altera.com/literature/manual/rm_avgx_fpga_dev_board.pdf Arria V GX FPGA Development Kit User Guide (English, PDF) http://www.altera.com/literature/ug/ug_avgx_fpga_dev_kit.pdf Kit installer ftp://ftp.altera.com/outgoing/devkit/12.0/arriaVGX_5agxfb3hf40es_fpga_v12.0.0.exe Please provide the correct links. Best regards, Hachiware.143Views0likes8CommentsFIR IP configured for Interpolation
Why does my Altera FIR IP, configured for interpolation by 80, produce the expected outputs when I provide 3 input samples, but fail to produce the expected behavior when I provide 10 input samples? In this case, the FIR IP keeps tready asserted high, but only generates 4 valid outputs. What could be causing this behavior? I am simulating this in Quartus Prime Lite Edition.155Views0likes2CommentsMAX10 FPGA IOs not entering Tri-state (Hi-Z)
Hello Team, I am using 10M16 FPGA and observed that the IOs are not getting tri-stated/ Hi-Z state after: The Reset is released through a switch / press button on "DEV_CLRN" pin, considering there is no .sof/ .pof code flashed. Hardware Configuration: "DEV_OE" pin is Grounded with 10K resistor. Reference: Intel® MAX® 10 Device Handbook - Combined Pin Name Pin Functions Pin Description Connection Guidelines DEV_OE Input, I/O This is a dual-purpose pin. Optional pin that allows you to override all tristates on the device. When this pin is driven low, all I/O pins are tristated. When this pin is driven high, all I/O pins behave as programmed. You can enable this pin by turning on the Enable device wide output enable (DEV_OE) option in the Quartus Prime software. Altera recommends you to tie the DEV_OE pin to GND when the Enable device-wide output enable (DEV_OE) option is disabled and not used as a user I/O pin. You can also tie the DEV_OE pin to VCCIO or leave the DEV_OE pin unconnected provided that the Enable device-wide output enable (DEV_OE) option is disabled and not used as a user I/O pin. When you leave the DEV_OE pin unconnected, Altera recommends you to set the DEV_OE pin to input tristate with a weak pull-up.167Views0likes1CommentRecommendations for Quartus Prime File Cloud Storage
Hi All, Currently users in our organization are able to use Box Drive to backup and store Quartus files in the cloud. We are unfortunately getting rid of Box Drive and moving users over to OneDrive. With the known issues with Quartus Prime and OneDrive I wanted to see if anyone had any recommendations for alternative cloud storage platforms that work with Quartus Prime. The idea is to have a cloud location that we are able to backup projects to.13Views0likes0CommentsA topic explaining a problem with Cyclone V SoC - u-booting .rbf file failure - got rejected.
Hi Altera Comunity et al, I guess this is more of a question for the support and moderator people of this forum. The situation is I just posted a topic explaining a problem I am experiencing with Cyclone V SoC—U-boot failing to load the .rbf (FPGA load configuration ) file , during initial system bootup. I put a lot of information - attached files, links, etc. to give better context around the issue. But that post got flagged as Spam and got rejected. And I am just wondering what to do here. I tried editing that post (removing links and removing attached files) several times already, but it still stays flagged as spam. I don't know what to do further to fix this :( The original issue topic was : "Cyclone-V-SoC: U-Boot fails to fpga load .rbf file - Command 'load' failed: Error -6" Anyone, please advise. Thank you and Best Regards, - Monk M.Solved457Views0likes16CommentsLisence issue when running .do script
Hello, I am a beginner using the Questa FPGA starter edition for practicing SystemVerilog coding. I downloaded the 2025.2 Version and obtained the fix lisence according to NIC ID (my PC's Ethernet adapter's MAC address). And I set accordingly the environment variable(LM_LICENSE_FILE and SALT_LICENSE_SERVER) pointing to the .dat file. The software Questa run successfully. But when I want to use a .do script to run a simple SV simulation, the process failed and showed as attachment 1. The programm is simple and I believe it has no advanced grammar (attachment 2 and 3), but it still failed. Is that the limination of Starter Edition or problem about lisencing? Thank you in advance.75Views0likes5CommentsStratix 10 fPLL is cascade source mode doesn't lock
Hello everyone. I use fPLL cascading with Stratix 10 FPGA: fPLL in cascade source mode is connected to fPLL in transceiver mode. In my design reference clock for fPLL in cascade source mode is not stable after power-up and I apply user recalibration to it. But after user recalibration when reference clock is stable, fPLL doesn't set lock signal. After some investigation of the issue, I found that my design works fine with Quartus Pro 21.2 but doesn't work with newer versions like Quartus Pro 23.4/25.1/26.1. Is there any known issue about fPLL is cascade source mode? Any suggestions about how to overcome this issue are welcomed.48Views0likes0CommentsQuartus Prime Pro 26.1 - Where to find Documentation of new Signaltap features
Hello, Quartus Prime Pro 26.1 is advertizing new SignalTap Python API. But there's no 26.3 Signaltap User Guide yet available. Where to find a documentation of Python interface or example code? Regards FrankSolved185Views0likes9Comments
Featured Places
Community Resources
Check out the support articles on personalizing your community account, contributing to the community, and providing community feedback directly to the admin team!Tags
- troubleshooting10,390 Topics
- fpga dev tools quartus® prime software pro4,278 Topics
- FPGA Dev Tools Quartus II Software3,160 Topics
- stratix® 10 fpgas and socs1,547 Topics
- agilex™ 7 fpgas and socs1,459 Topics
- arria® 10 fpgas and socs1,369 Topics
- stratix® v fpgas1,316 Topics
- arria® v fpgas and socs1,228 Topics
- cyclone® v fpgas and socs1,055 Topics
- Configuration1,003 Topics
Recent Blogs
4 MIN READ
Runtime flexibility is only valuable when it is reliable High-speed systems are being asked to do more with the same hardware. A data-center platform may need to operate as a single 400G Ethernet link in one deployment, then support multiple 100G links in another. A front-haul or edge system may need to adapt to different rates, protocol roles, or customer configurations over the life of the product. The promise is simple: deploy one platform, then adapt it as requirements change. But in high-speed design, changing a configuration is not the hardest part. Changing it correctly is. A live transition is not just a speed change. It can require coordinated updates across the the various networking layers, along with clocking, lane mapping, reset behavior, and link recovery. If those layers do not move together and in the right order, the result can be an unstable link, silent data corruption, or a system that hangs indefinitely waiting for CDR lock. That is the real value of Altera Dynamic Reconfiguration: it gives designers confidence that runtime transitions are clean, verified, and repeatable. The Altera difference: clean, verified transitions Altera Dynamic Reconfiguration is built around a profile-driven, silicon-aware flow. Designers define the target operating modes in Quartus Prime, and the system generates validated profiles for each supported state. At runtime, the Dynamic Reconfiguration Controller applies the selected profile through a managed, hardware-driven sequence. It orchestrates the transition across the full protocol stack, ensuring MAC, FEC, PCS, and PMA layers are updated in a coordinated and deterministic order, rather than leaving the designer to manually manage each step. The result: clean, verified transitions - no partial configurations, no unsequenced resets, and no user-managed state machines to debug at 2 a.m. This matters because the transition itself is often where risk appears. A system may appear to support multiple modes on paper, but if each layer must be independently controlled, reset, and validated by user logic, the design team carries the burden of proving that every edge case works under real operating conditions. Altera reduces that risk by turning reconfiguration into a controlled system operation. The selected profile is known, and the transition is repeatable. Silicon-driven confidence The assurance comes from the architecture. Agilex devices use hardened transceiver and protocol IP designed for high-speed operation. Rather than treating reconfiguration as a collection of ad hoc register writes, Altera Dynamic Reconfiguration works with hardened IP and validated profiles to help ensure that runtime switching happens in a controlled, silicon-driven way. That silicon foundation is especially important at 100G and 400G data rates, where small sequencing mistakes can lead to difficult debug cycles. When designers hand-craft transceiver reset state machines, getting the order right, the timing right, and the edge cases right can take weeks. With Altera, those critical sequencing responsibilities are built into the reconfiguration flow. The benefit is not just ease of use. Ease of use is a result. The primary benefit is trust: designers can enable live switching with greater confidence that the system will move from one valid state to another without glitches. A practical advantage for real systems In real deployments, flexibility has business value only if it does not create operational risk. Altera Dynamic Reconfiguration helps a single hardware platform support multiple configurations while avoiding the disruption of a full FPGA reprogramming cycle or duplicate hardware paths for every possible mode. For networking platforms, this can mean supporting different Ethernet configurations on the same physical transceiver resources. For multi-protocol systems, it can mean adapting a port role as requirements evolve. For platform owners, it means more deployment options from the same hardware design. This is where Altera has a practical positioning advantage: customers get runtime flexibility with more of the critical transition behavior handled by the platform. Instead of asking designers to manually manage every reconfiguration step, Altera provides a structured flow designed to produce predictable, verified results. What the demo proves The Agilex 7 400G Dynamic Reconfiguration demo turns this story into proof. In the demo, two Agilex 7 FPGA boards are connected over QSFP-DD, and the system dynamically switches between a 400G Ethernet configuration and multiple 100G Ethernet links using the same setup. The demonstration shows more than a mode change. It shows live traffic validation, link status, packet counters, error status, and FEC behavior during the transition. That is the point: the feature is not theoretical. It is running on silicon, switching in real time, and validating the kind of clean transition designers need before they trust the feature in production systems. Why this matters now As data-center, telecom, edge, and industrial systems become more configurable, customers increasingly need hardware platforms that can support multiple roles over time. The question is no longer whether a system can support more than one mode. The question is whether it can switch modes cleanly, predictably, and with confidence. Altera Dynamic Reconfiguration is designed for that moment. It combines hardened IP performance, profile-driven control, and coordinated sequencing to deliver runtime flexibility without compromising reliability. Dynamic reconfiguration is valuable because it enables flexibility. Altera makes it compelling because it makes that flexibility trustworthy. Watch the Runtime Reconfiguration You Can Trust demo video
3 days ago1like
Agilex® 9 Direct RF-Series FPGAs help system designers address two critical RF system priorities: lower latency and improved SWaP (size, weight, and power). By integrating high-performance RF data converters directly with FPGA fabric, Agilex 9 Direct RF-Series FPGAs can reduce RF-to-baseband latency, simplify the signal chain, lower system power, and free up valuable board space for future capabilities addition. In a draft comparison of discrete JESD-based architectures versus an Agilex 9 integrated Direct RF approach, the integrated solution showed up to 78% lower latency versus a JESD204C discrete solution and up to 86% lower latency versus a JESD204B discrete solution. The comparison also showed approximately 40% lower power consumption and up to 48% board-area reduction. These gains support both primary value propositions: faster system response through lower latency, and better SWaP through fewer external components, lower power, and a smaller, more efficient RF design. Digital radio frequency memory (DRFM), electronic attack, and electronic protection are good examples of applications where latency improvements can make a meaningful difference. In these types of RF systems, lower RF-to-baseband latency helps systems act on complex signals faster, improving responsiveness, timing precision, and mission effectiveness in contested electromagnetic environments. The SWaP benefit is also critical in long-lifecycle aerospace and defense platforms which may remain operational for decades, yet have limited space, weight, power, and cooling capacity for new hardware. As signal environments evolve, these platforms need room to add or upgrade capabilities without major system redesigns. By integrating RF data conversion with FPGA processing, Agilex 9 Direct RF-Series FPGAs can help system designers improve responsiveness, reduce board area, simplify the RF signal chain, and create more headroom for future upgrades. Learn more about Agilex 9 Direct RF-Series FPGAs and the benefits of integrated data converters. Discover how Agilex 9 Direct RF-Series FPGAs enable lower-latency and more power-efficient RF system designs Download the Altera® Direct RF-Series FPGA Wideband Product Brief Source for draft proof points: Agilex 9 Direct RF-Series integrated data converter app note draft, version 0.1, last updated March 31, 2026.
4 days ago0likes
2 MIN READ
New DDR5-6400 support delivers a 14% increase in maximum DDR5 data rate, strengthening Agilex® 7 M-Series device’s memory leadership on a production device family. This effort reflects Altera’s continued investment to improve features on platforms already in volume production. For customers building high-performance FPGA-based systems, memory capability is a core platform requirement, and the level of memory performance increasingly shapes overall system differentiation. That is why this latest Agilex 7 M-Series enhancement matters. With DDR5 support increasing from 5600 MT/s to 6400 MT/s, Agilex 7 M-Series devices support a 14% increase in maximum DDR5 performance on a device family already shipping in production. The significance of this update goes beyond speed alone. It reinforces a broader story about platform value: more usable bandwidth, better system efficiency, and continued innovation on a platform customers can design around today. More bandwidth, better system efficiency DDR5-6400 is not just a higher interface number. It enables more memory bandwidth from the same platform, helping customers move more data through bandwidth-intensive designs. That added bandwidth can also improve bandwidth density at the system level. In practical terms, it can help designers reach target throughput with a more optimized memory subsystem, potentially reducing DIMM or channel requirements in some designs and improving overall platform efficiency. Those advantages become increasingly important in the kinds of applications Agilex 7 M-Series devices are built to address. Across AI, networking, video processing, and data center infrastructure, system performance depends not only on compute capability, but also on how efficiently data can be moved and sustained through the platform. A broader production-ready platform advantage This update also says something important about the platform itself. Agilex 7 M-Series devices already offer production-ready support for advanced external memory technologies, and DDR5-6400 extends that advantage further. As next-generation infrastructure platforms evolve for AI, scale-out networking, and data-intensive acceleration, advanced memory capability is becoming an increasingly important platform differentiator. DDR5 support is now emerging across a broader range of FPGA segments, including mid-range devices such as Agilex 5 and even power- and cost-optimized devices such as Agilex 3 (with LPDDR5 support). Agilex 7 M-Series devicesbrings DDR5-6400 to a high-end FPGA platform tier built for larger, more data-intensive AI, networking, and infrastructure applications. By combining advanced memory performance with substantially greater logic capacity, it delivers differentiation at the platform level. This enhancement is enabled through an upcoming release of Quartus® Prime Pro Edition and is designed to be backward compatible with previously shipped silicon and boards. Customers interested in enabling DDR5-6400 should contact Altera for additional guidance on supported configurations, applicable speed grades, and implementation details. Conclusion The move to DDR5-6400 on Agilex 7 FPGAs and SoCs M-Series delivers a 14% improvement in maximum DDR5 data rate, improving bandwidth density and system-level efficiency while extending the value of a production-ready platform for evolving customer requirements. Watch the DDR5-6400 Demo Performance Video
4 days ago0likes
2 MIN READ
Altera introduced three new Agilex® 7 M-Series FPGA package options, R31G, R47C, and R47D, to give customers more flexibility in balancing bandwidth, connectivity, and performance for AI, networking, video, embedded, and acceleration applications. The new options support DDR5-6400, up to 204.8 GB/s memory bandwidth, and expanded transceiver configurations, enabling designers to optimize systems for PCIe connectivity, maximum data throughput, or efficient right-sized scaling.
9 days ago0likes
This post demonstrates a 200G-4 Ethernet link running on Agilex 7 FPGAs using F-Tile transceivers. It walks through the full link bring-up process, including Auto-Negotiation and Link Training, followed by stable high-speed data transmission using 53.125G PAM4 lanes over QSFP-DD. The demo provides real-time visibility into link status, signal integrity, and error metrics, and evaluates performance across loopback configurations and varying cable lengths. The result highlights reliable link initialization, consistent throughput, and robust operation under practical system conditions.
23 days ago0likes