Recent Content
Why do multiple pulses occur on flr_received signals when host do function level reset to an endpoint device of Scalable Switch IP for PCI Express*?
Description Due to a problem in the Quartus® Prime Pro Edition software version 24.1 and later, you may see multiple pulses on flr_received signal of Scalable Switch IP in FLR operation. Resolution To work around this problem, you should respond to flr_completed signal for each pulse on flr_received. This problem is scheduled to be fixed in a future release of the Quartus Prime Pro Edition software.Why does Nios® V/g processor experiences data corruption when it is enabled with TCM and ECC?
Description Due to a problem in the Quartus ® Prime Pro Edition Software version 26.1, data corruption might occur in Nios ® V/g processor designs with tightly coupled memory (TCM) and error correction code (ECC). Both features must be enabled to observe this problem. It is caused by an RTL bug in the processor, which renders failure when the processor executes sw (store word), followed by sh (store halfword) or sb (store byte) instructions. For example, # Initially, value of Y is 0x0001CCCC. li t0, 0x12345678 li t1, 0x200A sw t0, 0(Z) # Store 0x12345678 word into Z sh t1, 0(Y) # Store 0x200A into lower half of Y Result Final value of Y Description Expected 0x0001200A Upper-half of Y is preserved as 0x0001, while lower-half of Y is changed to 0x200A. Actual (Data Corruption) 0x1234200A Upper-half of Y is corrupted to 0x1234, while lower-half of Y is changed to 0x200A. The 0x1234 is from the previous Store Word (sw) instruction. Resolution To work around this problem in the Quartus ® Prime Pro Edition Software version 26.1, apply either one of the solutions below: Disable TCM. Disable ECC. This problem is scheduled to be fixed in a future release of the Quartus ® Prime Pro Edition Software.Why is the Direct‑to‑Factory Image Pin reported as an Output?
Description Due to a problem in the Quartus® Prime Pro Edition Software version 26.1 and earlier, you will see the compilation report identifies the Direct‑to‑Factory Image pin as an output after completing a full compilation in Quartus® Prime Pro Edition Software targeting Agilex® 7 FPGA device and Agilex® 5 FPGA device. According to the Agilex® 7 FPGA Configuration User Guide and Device Configuration User Guide: Agilex® 5 FPGAs and SoCs, this pin is defined as an input. Resolution This is a reporting discrepancy found in the Quartus® Prime Pro Edition Software. The Direct‑to‑Factory Image pin is correctly defined as an input. This problem is scheduled to be resolved in a future release of the Quartus® Prime Pro Edition Software.What is the latest device firmware for the Quartus® Prime Pro Edition Software version 25.3?
Description The latest device firmware for Quartus® Prime Pro Edition Software version 25.3 is available for download below. Fixes for the following problems are included in the latest release (The newest release contains all prior fixes and supersedes earlier device firmware releases). Change Log Firmware version 0.23fw: Agilex® 7 FPGA I-Series catastrophic trip (nCATTRIP) signal asserts at a temperature lower than the pre-configured threshold setting. Fixed the firmware flow during channel switching causing nCATTRIP to assert earlier than expected. Firmware version 0.03fw: Fixed race condition in handling SHA isr and resumption of FPGA data blocks. Drain DMA post a configuration/PR to flush out left over data if any. Resolution Download the latest device firmware below. Note: Patches must be applied to the Quartus® Prime Pro Edition Software and the Quartus® Prime Pro Edition Software Programmer and Tools. Recompilation is not required. All programming files should be recreated. Re-run the programming file generation or conversion using the Quartus® Prime Software programming file generator.What is the latest device firmware for the Quartus® Prime Pro Edition Software version 25.1?
Description The latest device firmware for Quartus® Prime Pro Edition Software version 25.1 is available for download below. Fixes for the following problems are included in the latest release (The newest release contains all prior fixes and supersedes earlier device firmware releases). Change Log Firmware version 0.35fw: This patch fixes potential failures observed when loading factory image with State 0xf0040074 Error location Firmware version 0.25fw: This patch fixes a rare scenario issue where the Agilex® 7 FPGA F-series device hangs when reconfiguring back-to-back. The fix includes an update to the polling scheme in firmware to address the issue. Please also see the following links: Updating the SDM Firmware in the Agilex® 7 FPGA Configuration User Guide Updating the SDM Firmware in the Stratix® 10 FPGA Configuration User Guide Resolution Download the latest device firmware below. Note: Patches must be applied to the Quartus® Prime Pro Edition Software and the Quartus® Prime Pro Edition Software Programmer and Tools. Recompilation is not required. All programming files should be recreated. Re-run the programming file generation or conversion using the Quartus® Prime Software programming file generator.Why does the Altera® Advanced Link Analyzer Crash or Produce Incorrect Results on Microsoft Windows 11* 25H2 Virtual Machines?
Description The Altera® Advanced Link Analyzer may crash or produce incorrect simulation results on Microsoft® Windows 11 version 25H2 virtual machines configured with ABI‑based virtual CPU models. This problem occurs because the Intel® Math Kernel Library (MKL) depends on hardware‑faithful x86 CPU execution semantics, which are not fully guaranteed by ABI‑based vCPUs in Microsoft Windows 11 25H2. Resolution To work around this problem, you can configure virtual machines as follows: Microsoft Windows* 11 version 25H2 Use a hardware-faithful vCPU (for example, VMware ESXi* or VMware Workstation* default vCPU) On KVM/QEMU platforms, enable host CPU passthrough Microsoft Windows Server 2022, Windows Server 2025, and Windows 11 version 24H2 or earlier ABI-based virtual CPUs are supported; no changes required Additional Information This problem only affects Microsoft Windows 11 version 25H2 virtual machines using ABI‑based virtual CPU models. Other Windows versions and hardware‑faithful virtual CPUs are not affected.Why ECC protection does not work in F-Tile Dynamic Reconfiguration Suite IP?
Description Due to a problem in the Quartus® Prime Pro Edition Software version 26.1 and earlier, you will observe the Enable ECC protection parameter in the F-Tile Dynamic Reconfiguration Suite IP does not function as expected. Even though you set Enable ECC protection parameter as ON, the ECC protection could not be enabled. Resolution There is no workaround available. This problem is scheduled to be fixed in a future release of the Quartus Prime Pro Edition software.Why do I see configuration failure "Error(18948): Error while sending VOUT_MODE command" if the PMBus Slave device type is set as XDPE12284C or PXE1410CDM_G005 for Agilex® 7 FPGA in Quartus® Prime Pro Edition Software version prior to 26.1?
Description Due to a problem in Quartus® Prime Pro Edition Software version prior to 26.1, when you select the "Slave device type" as XDPE12284C or PXE1410CDM_G005 in the Power Management & VID settings page in your design, you may see the following error while programming SOF file with Quartus® Prime Pro Edition Programmer: Error(18948): Error message received from device: Error while sending VOUT_MODE command Resolution In Quartus® Prime Pro Edition Software version prior to 26.1, if you are using XDPE12284C or PXE1410CDM_G005 as the PMBus Slave device for Agilex® 7 FPGA, select the "Slave device type" as "others" in the Power Management & VID settings page as shown in the table below. Voltage Regulator Slave device type Voltage output format Coefficient Voltage value unit XDPE 12284C (IMVP9 mode) Others Direct m=1, b=-200, r=-1 millivolt PXE1410CDM_G005 Others Direct m=2, b=-490, r=-1 millivolt This problem has been fixed in Quartus® Prime Pro Edition Software version 26.1.Why does PTP accuracy error go beyond +/- 1.5ns during dynamic reconfiguration between GTS Ethernet Hard IP and Triple-Speed Ethernet IP in Quartus® Prime Pro Edition version 26.1 and earlier?
Description When using the GTS Dynamic Reconfiguration Controller IP flow in Quartus® Prime Pro Edition version 26.1 or earlier to perform dynamic reconfiguration between the GTS Ethernet Hard IP and the Triple-Speed Ethernet (TSE) IP, the PTP (Precision Time Protocol) accuracy error for the GTS Ethernet Hard IP may exceed ±1.5ns in this scenario. This PTP accuracy problem does not occur with the TSE IP in this case. Resolution No workaround is available so far. This problem is scheduled to be fixed in a future release of the Quartus Prime Pro Edition software.Why does the Single Floating Point Variable Streaming Reverse FFT IP produce an incorrect output when the input order is set to Natural?
Description Due to a problem in the Quartus® Prime Software version 25.3.1 and earlier, the "Natural" option for setting "Input Order" is incorrectly available for selection and unsupported when generating the FFT IP. This option is available when using the following parameters: Direction: "Reverse", Data Flow: "Variable Streaming", Representation: "Single Floating Point". Resolution This problem is scheduled to be fixed in release 26.1 of the Quartus® Prime Software with the removal of the unsupported “Natural” option. Additional Information This problem affects the FFT IP in Quartus® Prime Software versions 17.0 to 25.3.1.
