View All num of num See all Photos Xilinx www.xilinx.com Engaged Employer Overview Reviews Salaries Interviews Jobs Photos Benefits 429 Reviews 794 Salaries 81 Interviews 137 Jobs Follow Add Review or Salary Follow Add Review or Salary Interview Question Validation Engineer Interview Dublin, Dublin (Ireland) Xilinx Tell us the structure of a FPGA. How do they work? Tags: virtex 6, fpga See more , See less 8 Answer Add Tags Answer Interview Answer 1 Answer ▲ 1 ▼ (An Example answer of the Virtex-6 family)The Configurable Logic Blocks(CLBs) are the main logic resources for Virtex 6 devices. One Virtex-6 CLB has up to 1412MHz toggle frequency. It contains two Virtex-6 slices. Each Virtex-6 slice contains:• Four 6-input LUTs or dual-output 5-input LUTs• Can be used as: Two 5-input lookup-table• 8 flip-flops• Arithmetic logic gates• Large multiplexers• Fast carry look-ahead chain• 128bits Shift registers (only on 1/3 SLICEM slice)• 256bits Distributed RAM (only on 1/3 SLICEM slice) Interview Candidate on Jun 19, 2011 Interviews > Validation Engineer > Xilinx Add Answers or Comments To comment on this, Sign In or Sign Up.