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The interface makes the FPGA

November 24, 2009

Announcements from the FPGA industry this week continue the trend of the past year of placing the serial interface before the gate count or the core-logic IP – an understandable strategy, given the number of vertical markets for which interface virtually defines application (note that I did not say raw speed, though that is a secondary consideration).

Xilinx Inc. used the recent InterBEE conference in Tokyo to spotlight the latest of its Targeted Design Platforms, in this case one for broadcast video. The “Broadcast Connectivity” platform utilizes Virtex-6 devices with SDI interfaces that can be applied to SD, HD, or 3-D SDI connections, in single-chip instantiations that include up to 24 transceivers. While the Virtex-6 itself and the ISE Design Suite obviously are important elements of this kit, the star of the show as seen from here is the FPGA Mezzanine Card used to implement both the video interfaces themselves, and the bridging technologies tying the interfaces together. The triple-rate SDI links cover 270 Mbit/sec (SD), 1.485 Gbit/sec (HD), and 2.97 Gbit/sec (3-D SDI) speeds.

Meanwhile, Lattice Semiconductor Corp. and Altera Corp. have added Serial RapidIO 2.1 support to their ECP3 and Stratix IV families, respectively, in the form of soft IP blocks. Some folks concentrating on server-cluster or wireline communication applications may see SRIO as an also-ran link competing with the likes of HyperTransport inter-chip and PCI Express board-to-board. But Lattice and Altera rightly point out that SRIO is winning a dedicated space in advanced base stations, where the links are used to connect baseband clusters, formerly implemented in dedicated DSPs, but now increasingly in DSP/FPGA mixes. Lattice’s 2.1 update support single- dual- and quad-lane SRIO at speeds up to 3.125 Gbits/sec, while Altera expands to as many as four lanes, at up to 5 Gbits/sec per lane.  These speeds allow low-power base stations to support 4G mixes of Long-Term Evolution and WiMAX.

Expect I/O to define the 2010 market for FPGAs – not just in terms of raw speed of the Serdes, but also in terms of the Layers 1 through 3 protocols supported for these emerging markets.

 

Posted by Loring Wirbel on November 24, 2009 | Comments (3)

April 16, 2010
In response to: The interface makes the FPGA
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November 26, 2009
In response to: The interface makes the FPGA
Eric Esteve commented:

I globally agree with what it said in the article. Nevertheless, I would add a few Interface protocols: - Ethernet: look at the partnership between Altera and MorethanIP (Ethernet MAC IP). This partnership is active since 2005 I guess - USB: for the previous release of USB (2.0 HS @ 480Mb/s), FPGA was not considered because it was a very price sensitive market (PC peripherals and Consumer). With SuperSpeed USB(5gb/s), because the ASIC prototyping cost have exploded for the latest technologies (40nm or 28nm), the option to develop a FPGA and access the market quickly and at a much lower development cost may valid an approach based on FPGA to test the market with a short TTM... then move to another solution (real ASIC, hardcopy or low cost FPGA family) for production cost. The USB 3.0 PHY is so close to PCIe Gen-2 that it should not be a technology issue on the High End FPGA families (Virtex or Stratix). The issue will be for a customer to be sure to find a low cost family for the production with USB 3.0 PHY integrated... the FPGA vendors have some homework to do. I know for sure that an IP vendor selling USB 3.0 Controllers has made some IP sales for FPGA technologies, there is customers who think that make sense to develop a product with SuperSpeed USB support on FPGA. - Finally, if you look at the FPGA startups like Achronix or M2000, they have based their product on Ultra High Speed I/O support, with Multi Protocol SERDES for: 40G/100G Ethernet CEI-6G 10 Gbps backplane XFI PCI-Express XAUI Serial RapidIO Just to say that High Speed I/Os are the present and the future for FPGA technologies, and that it is not restricted to PCIe, HT and Serial RIO! Interested into Interface IP, just have a look at www.ip-nest.com, you will find plenty of information... Infiniband


November 24, 2009
In response to: The interface makes the FPGA
Andy T commented:

I/O also defined the market for FPGAs in 2005, 2006, 2007, 2008, 2009.... The FPGA is still a system afterthought, versus system critical core function. TI defines SRIO as the DSP interconnect and the FPGA dogs chase it down the street two years later. 1000 DSP resources on chip for an FPGA and it's still a PERIPHERAL device to a DSP. Intel does PCIe, the dogs wag their tails and define I/O, and soft/hard IP to support it. If I/O truly defined the market, we'd see FPGAs taking the lead in system partitioning and protocols. IMO it has yet, if ever, to do that in most relevant-systems that are out there.

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