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Is Xilinx an FPGA?
Xilinx is the inventor of the FPGA, hardware programmable SoCs, and the ACAP, designed to deliver the most dynamic processor technology in the industry. Our break-out portfolio also includes the industry’s only hardware programmable homogeneous and heterogeneous 3D ICs with the highest bandwidth and system integration.
What is FPGA speed grade?
Fpga speed grade is a maximum frequency at which the flops in fpga can run. Example, a altera apex -1 runs faster (~ 250 MHz as I remember) than a altera apex -2 or -3. Of course, a device run faster which is more expensive.
What is the purpose of FPGA?
FPGAs are particularly useful for prototyping application-specific integrated circuits (ASICs) or processors. An FPGA can be reprogrammed until the ASIC or processor design is final and bug-free and the actual manufacturing of the final ASIC begins. Intel itself uses FPGAs to prototype new chips.
What do the numbers mean on a Xilinx FPGA?
According to Xilinx FPGA product datasheets, the numbers on the 5th line as 4C or 5I stand for speed grade and temperature.I have a XC3S400 with 4C speed grade (4= standard speed, 5= High performance). I want to know what exactly the standard speed grade means ? Can I relate it to a specific bandwidth?
How does the speed grade work on a FPGA?
Originally speed grades for FPGAs represented the time through a look up table but now the speed grade doesn’t actually repesent a timing path. I am not sure if it is the same for other vendors, but for Xilinx FPGAs higher numbers are faster. Each speed grade increment is ~15% faster than the one before it.
What does speed grade mean on a CPLD?
For CPLDs, speed grades represent the time it takes for logic to go through the device (eg. in <= out). So a -10 device means that the device is guaranteed to send a signal from an input pin thru to an output pin in under 10 nS. So for CPLDs, the lower the number, the faster the part is.
What is the meaning of speed grade marking?
Speed grades used to correlate with a measurable element (IIRC it was the delay through a look-up table, so a -1 part had a 1ns delay). Routing started to play a much bigger role in the performance. That’s not the only performance parameter that you are interested in, especially once Block RAMs, multipliers and DSP elements etc come in to play.