About floating voltage of the Agilex 3 power on reset
Hello, I am Naken, thank you for your support. I have created a board equipped with Agilex 3 and started debugging it recently. When checking the power pins during power-up, it appears that a floating voltage from the VCC system (0.75V) is entering the power system that supplies HVIO (3.3V). (I can send images individually if needed.) As described in the documentation, it mentions that due to floating voltage, VCCIO_PIO can be affected by VCCPT. 3.3. Floating Voltage • Power Management User Guide Agilex™ 3 FPGAs and SoCs • Altera Documentation and Resources Center Is it possible that the HVIO group experiences floating voltage due to the influence of the VCC system group? Best regards, Naken
eFUSE : Agilex F series and AGilex I series PCIe card
Hi, While going through the schematics design of Agilex F series(1xE tile, 1X P tile) pcie card, I observed that in the there is a efuse "TPS259824" each for the 12v input from PCIe slot and 12V input from AUX connector where as in Agilex I series (2x R tiles, 1x F tile) pcie card it is removed from the schematics. EFuse protects the board from over current and inrush current, short circuit and overload, why is it removed from the Agilex I series Pcie card. PS: Please check the shared screen shots from schematics
MaxV - Current Value
My customer is using MAX V CPLD. Part numbers are 5M1270ZF256C4N, 5M1270ZF324C5N. They have to interface 5V address and data lines of flash memory to these CPLDs. I studied datasheet, it is saying that we can interface 5V signal to Bank-3 IO pins if we use series resister plus internal I/O clamp diodes being enabled. I could not find acceptable current limit for clamp diode from datasheet. So that I can calculate resister value. Can you please provide max and nominal current limit value for internal IO clamp diode which can pass safely through it? Regards amolkumar
Regarding Power-Up Sequence for Agilex 5
Regarding the power sequencing of Agilex 5, the required power-up sequence is specified in the documentation. However, in our case, the sequence was not properly followed. Could you please advise what kind of impact may occur on the FPGA if voltages are applied under such a condition where the specified power sequence is not met? Power Management User Guide: Agilex 5 FPGAs and SoCs https://docs.altera.com/viewer/book-attachment/PgABpvRJy7P6fU_ZAXzUJw/zAjQMZanXPEHuIot~~5CbA-PgABpvRJy7P6fU_ZAXzUJwQuartus and power domain
We actually one remaining pending issue with the Agilex chip that we can't get resolved and might need some help. The basic description is that when comparing the power consumption of the Agilex 5 on our module, to the Agilex 5 on the dev kit, at same temperature, before any configuration, our Agilex 5 consumes about 0.5-1W more. Besides this, all sub-systems seem to operate correctly (CPU, memory, FPGA, I/Os). This additional power consumption is worrying though, and we would like to understand it before spinning the next revision. Regarding the excess power on our board, it might also be a design issue, but we didn't find any hint yet despite multiple deep reviews and investigations. We already spent several weeks looking at this in every way we could think about, so there is already quite a bit of things we tried out, such as: - Measured the power rails, from the outside and from the inside as well, checking if there is any unexpected difference - Measured temperature from the outside (thermal camera) as well as from the multiple internal sensors - Reviewed power sequence, playing with various combinations to see if it made any difference - Reviewed multiple times schematics against documentation and dev kits The extra power is on the core rail. Now please look at the attachement: We collected side observations on an non-configured FPGA. Our board has a temperature-dependent power consumption. So we simply switched the fan off for a short period and then switched it back on. The main power consumption is on the 0.8 V rail (U500 RAA210130). A second interesting observation is the internal temperature of the Agilex: L0_0 is significantly hotter than the other three. When the fan is switched back on, the power consumption returns to its initial value. Very strange and unusual behavior. Could this somehow help set priorities and allow us to rank the most/least likely directions for investigating the source of the elevated power consumption?Power consumption between Agilex3 and Microchip Polarfire FPGA
Microchip claim their FPGA has lower power consumption than SRAM based FPGA , no matter how advanced node used for Altera. is there an official feeback to those claim ? if customer design is battary powered and really care power consumption rather than fabric or tranciever performance, what is the advantage of Agilex 3 comparting to Microchip Smartfusion and Polarfire in power consumption. has Altera done any comparision regarding power consumption ? Any comparision data availalble to share? https://www.microchip.com/en-us/products/fpgas-and-plds/low-power Microchip FPGAs and SoC FPGAs consume up to 50% lower total power than competitive FPGAs. Our nonvolatile process delivers FPGA families that are live at power-up with minimal in-rush current, and significantly lower leakage than SRAM-based alternativesPower-Down Sequence Requirements for the Agilex 7 F-Series(2x F-Tile) Devices
Hi, Is there any power down sequence for Agilex 7 F-Series (2x F-Tile) Devices? I went through Agilex™ 7 Power Management User Guide, which lists power down sequence for Agilex 7 Devices with E-Tile & Agilex 7 M-Series Devices bit i could not find for F-Series (2x F-Tile) Devices. Thanks in-advance, Deva
Why does PTA show zero W for F-tiles in Hierarchical Design Editor
Why is there no power shown in the Hierarchical Design Editor(25.3: Current Level Dynamic Power, 26.1: Self Dynamic Power) when adding a fully utilized F-tile? The Total Power does however show the expected power. Is it a bug or a feature?
