Carbon nanotube nanorelays with passtransistor for fpga. In this paper we compare the routing architecture of islandstyle fpgas based on fieldprogrammable switch boxes with a maskprogrammable routing structure, in order to assess its position in the. Architectureaware fpga placement using metric embedding. An illustration of typical fpga architecture is shown in figure. Thus, the capability of processing the bidirectional routing architectures of the mainstream efpgas is obtained, while the conventional soft core. In xilinx routing, connections are made from logic block into the channel through a connection block. Suresh srinivasan, prasanth mangalagiri, yuan xie, n. Netfpga tutorial free download as powerpoint presentation. Given this side vmlayer already exists, a key issue is to automate the vmlayer migration from an architecture to an application description. A thorough evaluation of this architecture considering various wire parameters is conducted and compared to the traditional srambased fpga. Routing area per tile length 416 length 48 channel width changes with aspect ratio even ratio of length 4, 8 wires heterogeneous wires reduces delay 25 30% lutsize 4 area to 6 speed betz, tvlsi 2000 lewis, fpga03 hutton, fpga02 lewis. Switch blocks enable programmable interconnect in fpgas. The router runs the peewee ospf 3 routing protocol, and does address lookup and packet forwarding at linerate.
Different signals cannot share same nodes in routing network sharing congestion 3. In the following subsections, we discuss different components of the routing architecture and our dualvdddualvt routing architecture. Also described is a 3d variation aware routing flow, which is an essential tool for future 3d fpga architecture exploration. Whether each routing switch is a pass transistor or a. Exem94 exemplar logic, vhdl synthesis reference manual, 1994. From these threecompanies actel and altera have respectively solve their routing problems by adapting channelstyle asic routing algorithms 1 or over assigning routing resources 2.
A logic block is surrounded by connection blocks on all four sides. Architecture and cad for nanoscale and 3d fpga core. The architecture of an fpga specifies both the structure of its logic block and its programmable routing. As sram technology is used to implement lookup tables, connection sites are large. Optimize delay of critical nets take more direct routes. This paper describes the altera stratix ii logic and routing architecture. Fast reroute detection of link failure or topology change in the reference router is generally based on the ospf messages timing out. Virtual array architecture for efpga design and reuse.
Routing architectures for hierarchical field programmable. The logic fabric and routing architecture in altera fpgas are unmatched, providing customers with a number of advantages. Pdf the stratix ii logic and routing architecture researchgate. Frequency scaled router is an energy efficient router that is able to dynamically adapt its routing capability in response to realtime traffic load, achieving energy proportional routing. As illustrated in the g ure 3, the schematic view of the nfpga cell consists of two parts. A novel design methodology for soft efpga is proposed. Automatic generation of fpga routing architectures from. To implement circuits in each fpga routing architecture of interest, one requires both a cad tool set incorporating sufficiently flexible. Our new fpga routing architecture is designed to maximize. This architecture features a novel adaptive logic module alm that is based on a 6lut, but can be partitioned into two smaller luts to efficiently implement circuits containing a range of lut sizes that arises in conventional synthesis flows. An fpga architecture with integrated logic and routing. Vantis 5 employ this style of routing architecture. Performance and power evaluation of a 3d cmosnanomaterial.
Routing architecture the programmable routing in an fpga provides connections among logic blocks and io blocks. As fpgas are migrated to even more advanced technologies. Find a feasible routing for all signals nets using routing network feasible means. A novel switch block and depopulated interconnect matrix architecture, m. In most commercially available fpgas, these routing structures consume the majority of the chip area, and are responsible for most of the circuit delay. This is the most commonly used architecture among academic and commercial fpgas.
Pdf this paper describes the altera stratix ii logic and routing architecture. Software implemented network management and participated in a distributed, dynamic routing protocol by responding to arp, icmp, and route update messages. In comparison with the previous soft core design approach, a structureddescription strategy is applied and the process of logic synthesis is bypassed in the new design flow. Fpga routing architecture analysis under variations. While most of the electronics industry is dependent on the everdecreasing size of lithographic transistors, this scaling cannot continue indefinitely. The architecture in 8 implements intercluster routing in one layer and clusters logic blocks or con. About us is commercial site for selling fpga development products and it is part of invent logics. Introduction to fpga and its architecture towards data. The l1 tile is made up of a lut and neighbortoneighbor directional routing resources. The length of each routing wire segment how many logic blocks a routing wire spans before terminating, 2. We are the developers of high quality and low cost fpga development kits. Compared to the heterogeneous architecture of commercial fpgas, liquid silicon is inherently a homogeneous architecture comprising a twodimensional 2d array of identical tiles.
Gusto is the first tool of its kind to provide automatic generation of a variety of general purpose matrix inversion architectures with different parameterization options. Routing architectures for hierarchical field programmable gate arrays aditya a. A novel predictable segmented fpga routing architecture. To wit, running rkd alongside a standard routing daemon, such as xorp, or zebraquagga, should provide hardware acceleration of the forwarding table without any further configuration provided the routing software is using the netfpga interfaces for forwarding. We also show that 50% to 80% of the routing switches in an fpga should be pass transistors, with the remainder being tristate buff ers. Second, the routing fabric is completely redesigned to use nanowires arranged in a crossbar with molecular switches placed at their junctions to provide programmability. We describe triptych, a new fpga architecture, that blends logic and routing. Defining the nfpga as an architecture is easy and appear using madeohdl. This islandstyle architecture is a very general version of most commercial architectures from altera and xilinx. The above mentioned routed design must be loaded and converted into a format supported by the fpga. Netfpga an open platform for gigabitrate network switching and routing john w. Section iv presents the details of 3d nfpga architecture.
Toolset for nanoreconfigurable computing sciencedirect. In this paper, we present two feature extensions to the netfpga reference router. Eflx200k test chip in tsmc16ffc 7x7 array 114,240 6luts 183k lut4s 560 22x22 macs 4. Here routing places the subblocks from the above process into the logic blocks according to the constraints and then connect those blocks device programming. In recent years, nanoelectronics has become one of the most important and exciting forefront in science and engineering. Netfpga 10g reference router netfpganetfpgapublic wiki. The routing architecture of an fpga is a dominating factor on the overall chip area, circuit delay and power consumption. Section v provides interconnect and device characterization for the 3d nfpga and an architecture evaluation cad flow. Gusto also provides an optimized application specific architecture with an average of 59% area. Section vi provides detailed performance and power results using the largest twenty mcnc benchmarks. Our implementation uses a pipeline to provide submodules arp.
This paper presents a datacentric reconfigurable architecture, namely liquid silicon, enabled by emerging nonvolatile memory, i. The packet data bus is used to transfer the packets between di. Hardware performed the address lookup, mac address learning, packet buffering, and packet scheduling. Open a project containing the picoblaze 8bit microcontroller and simulate the design using the isim hdl simulator provided with the ise foundation software. Achieving flexibility and performance for packet forwarding and data center management by daekyeong moon a dissertation submitted in partial satisfaction of the requirements for the degree of doctor of philosophy in computer science in the graduate division of the university of california, berkeley committee in charge. Leveraging emerging technology through architectural. We then draw some conclusions and discuss our future work in section. Collaborative routing architecture for fpga yaling ma, student member, ieee, and mingjie lin, student member, ieee abstractin this paper we present the collaborative routing architecture cra, a routing architecture specially designed to achieve high ef. Frequency scaled router netfpganetfpga wiki github. A green prototype router that can operate in five different frequencies is built based on the netfpga reference router. This means that the problem of routing is architecture dependent and therefore the number of routers needed to route fgpas is as varied as fpga architectures. Based on this device, the proposed fpga architecture, sgfpga, can maintain the baseline fpga architecture and significantly reduce the size and power consumption of.
The ip filter module is in charge of all layer 3 routing and layer 4 translation operations. Fast reroute and multipath routing extensions to the. Details of basic fpga logic blocks and different routing architectures are then described. Design and verification of a soft efpga using new method. Netfpga tutorial router computing field programmable. The nextgeneration architecture for your nextgeneration architecture while the wider bus implementation might lead to the need for a lower system clock frequency, significant timingclosure challenges now arise due to a lack of routing resources required to support systems with wide buses. Lap lambert academic publishing july 11, 2012 language. The architecture in 26 spreads lookup tables luts into different active layers and routes through 3d switch boxes. Lewis university of toronto department of electrical and computer engineering toronto, ontario, canada abstract this paper evaluates an architecture that implements a hierarchical routing structure for fpgas, called a hierarch ical fpga hfpga. These plots demonstrate that to model delays accurately in fpga placement, we need a metric that captures the delay contours of the fpga routing architecture, rather than the euclidean or manhattan metrics used in asic placement.
1278 502 685 1015 531 1118 256 770 1133 713 376 1197 331 1479 686 1038 704 118 1185 1429 1068 832 381 516 948 1488 848 320 1363 1308 343 208 1124 899 449 609 653 357 782 453