AMD

When selecting an AMD/Xilinx FPGA you must specify three attributes beyond logic capacity and memory size: Speed Grade, Temperature Range, and Reliability Grade. Understanding all three helps you choose the right device — and avoid paying for more than you need. AMD UltraScale+ Device Ordering Information (Product Selection Guide) Speed Grade Speed Grade is a post-fabrication classification (binning) that reflects the worst-case switching performance of a specific chip coming off the wafer. Even chips from the same wafer lot will have small transistor-level variations — some will reliably meet tighter timing margins than others. Chips that can do so are assigned a higher (faster) speed grade. ...

FPGAs are optimised for massive parallelism, but their on-chip memory resources are limited. Block RAM (BRAM) and UltraRAM (URAM) are fast and easy to use, but they typically provide only a few tens of megabits to a few hundred megabits of capacity. When your application needs gigabytes — high-resolution video frames, machine-learning weight tables, large look-up tables — external DDR memory becomes essential. Why External DDR Memory? Memory Type Location Typical Capacity Bandwidth Access Latency Distributed RAM On-chip (LUT-based) < 1 MB Very high 1 cycle Block RAM (BRAM) On-chip (dedicated) up to ~200 MB High 1–2 cycles UltraRAM (URAM) On-chip (UltraScale+) up to ~500 MB High 2–3 cycles External DDR Off-chip (dedicated chip) 1–16+ GB Medium-High ~50–100 ns For applications such as: ...

https://docs.amd.com/r/2021.1-English/ug949-vivado-design-methodology/When-and-Where-to-Use-a-Reset Advantages of Synchronous Resets BenefitExplanationBetter Resource MappingSynchronous resets can be mapped directly to more FPGA resources (e.g., flip-flops inside DSPs, BRAMs).Improved Logic PerformanceAsynchronous resets can negatively affect general logic timing paths and increase routing complexity.Simpler RoutingA global asynchronous reset might not increase control sets but does require routing reset wires to many elements, which can become complex.Protects Memory StructuresAsynchronous resets may corrupt the contents of BRAMs, LUTRAMs, and SRLs during reset assertion—especially if those resources are driven by asynchronously reset registers.Placement FlexibilityWith synchronous resets, the logic can be more easily remapped during implementation for better packing and performance.Compatibility with Dedicated BlocksSome blocks like DSP48s and BRAMs only support synchronous resets, so using asynchronous resets can prevent proper inference into those blocks. ...

https://www.amd.com/en/products/adaptive-socs-and-fpgas/intellectual-property/vio.html When debugging an FPGA, there are times when you need to modify settings or parameters and monitor internal signals in real time. Setting up communication interfaces, such as receiving input from switches and keys or using UART, can be a complex process. However, AMD FPGAs offer a solution with the Virtual I/O IP, which allows these tasks to be easily performed via JTAG. https://docs.amd.com/v/u/en-US/pg159-vio Xilinx Virtual Input/Output (VIO) is a soft IP core provided by Xilinx that allows you to monitor and control internal FPGA signals in real time using the Vivado Integrated Logic Analyzer (ILA) without needing physical I/O pins. ...

AXI stands for Advanced eXtensible Interface. It is a part of the AMBA (Advanced Microcontroller Bus Architecture) protocol family, developed by ARM. AXI is designed for high-performance, high-frequency system designs and is widely adopted in FPGAs and SoCs. Zynq SoC connects between Processing System (PS) and Programmable Logic (PL) Interconnection between Xilinx IP cores (e.g., Block RAM, DMA, TEMAC) Communication with MicroBlaze processor AXI Interconnect to connect multiple master/slave devices ...

In FPGA-based designs, Ethernet is commonly used as a communication interface with PCs. Whether for data transfer, debugging, or network-based control, Ethernet provides a flexible and high-speed connectivity option. To integrate Ethernet into an FPGA, the design typically consists of: MAC (Media Access Control) Layer: Handles frame encapsulation and transmission. PHY (Physical Layer) Interface: Manages signal-level modulation and transmission over the Ethernet medium. Higher-Level Processing: Can be implemented using embedded processors (such as MicroBlaze or ARM in SoC FPGAs) or custom hardware logic for protocol handling. ...

Effectively utilizing Vivado’s Text Editor can greatly assist in FPGA design. Let’s explore the advantages of the Text Editor in Vivado IDE (Integrated Development Environment) when developing AMD (Xilinx) FPGAs. **On-the-fly syntax checking: **Instant syntax check **Assistance with errors and warnings: **Markers in red or yellow appear on the right scroll bar. They allow you to navigate directly to the location of syntax errors or warnings. Additionally, you can hover (move the cursor over) to identify the specific error ...

Overview What is UART? UART (Universal Asynchronous Receiver/Transmitter) is a hardware communication protocol used for serial communication between two devices. It is called asynchronous because it does not require a separate clock signal like SPI or I2C. Instead, both devices agree on a common data rate (baud rate) to ensure correct data transmission. How Does UART Work? UART consists of two main data lines: TX (Transmitter) Line – Sends data. ...

Let’s explore the AMD (Xilinx) FPGA product families for reference https://www.amd.com/en/products/adaptive-socs-and-fpgas/fpga.html Looking at the Portfolio on the AMD FPGA (Xilinx) website, you’ll notice it is divided into three categories. These categories are UltraScale+, UltraScale, and 7 Series at the top. This categorization of product families is based on semiconductor process technology. UltraScale+ is manufactured on the 16nm FinFET process. UltraScale is manufactured on the 20nm process. 7 Series is manufactured on the 28nm process. ...

Major FPGA Manufacturers 1.AMD (Acquired Xilinx in 2022) Key Products: Spartan, Aritix, Kintex, Virtex, ZynQ, Versal Xilinx was a long-time leader in the FPGA market and was acquired by AMD in 2022. Provides high-performance FPGA and adaptive SoC (System-on-Chip) product lines. Produces products used in various fields such as data centers, communications, and automotive. **Intel (Acquired **Altera in 2015) Key Products: Cyclone, Arria, Stratix, Agilex Altera was acquired by Intel and integrated into the Intel FPGA business unit. ...