Xilinx UG393 Spartan-6 FPGA PCB Design Guide

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6 www.xilinx.com Spartan-6 FPGA PCB Design and Pin Planning UG393 (v1.1) April 29, 2010
Preface About This Guide Guide Contents Additional Documentation This guide provides information on PCB design for Spartan®-6 devices, with a focus on strategies for making design decisions at the PCB and interface level. This guide contains the following chapters: • Chapter 1, PCB Technology Basics, discusses the basics of current PCB technology focusing on physical structures and common assumptions. • Chapter 2, Power Distribution System, covers the power distribution system for Spartan-6 FPGAs, including all details of decoupling capacitor selection, use of voltage regulators and PCB geometries, simulation and measurement. • Chapter 3, SelectIO Signaling, contains information on the choice of SelectIO standards, I/O topographies, and termination strategies as well as information on simulation and measurement techniques. • Chapter 4, PCB Materials and Traces, provides some guidelines on managing signal attenuation to obtain optimal performance for high-frequency applications. • Chapter 5, Design of Transitions for High-Speed Signals, addresses the interface at either end of a transmission line. The provided analyses and examples can greatly accelerate the specific design. The following documents are also available for downloaded at http://www.xilinx.com/support/documentation/spartan-6.htm. • Spartan-6 Family Overview This overview outlines the features and product selection of the Spartan-6 family. • Spartan-6 FPGA Data Sheet: DC and Switching Characteristics This data sheet contains the DC and switching characteristic specifications for the Spartan-6 family. • Spartan-6 FPGA Packaging and Pinout Specifications This specification includes the tables for device/package combinations and maximum I/Os, pin definitions, pinout tables, pinout diagrams, mechanical drawings, and thermal specifications. • Spartan-6 FPGA Configuration User Guide Spartan-6 FPGA PCB Design and Pin Planning www.xilinx.com 7 UG393 (v1.1) April 29, 2010
Page 1 and 2: Spartan-6 FPGA PCB Design and Pin P
Page 3 and 4: Table of Contents Revision History
Page 5: Chapter 6: I/O Pin and Clock Planni
Page 9 and 10: Chapter 1 PCB Technology Basics PCB
Page 11 and 12: Transmission Lines Transmission Lin
Page 13 and 14: Chapter 2 Power Distribution System
Page 15 and 16: PCB Decoupling Capacitors Table 2-1
Page 17 and 18: PCB Decoupling Capacitors Capacitor
Page 19 and 20: PCB Decoupling Capacitors 0402 Cera
Page 21 and 22: Basic PDS Principles Because the vo
Page 23 and 24: Basic PDS Principles Requirements f
Page 25 and 26: Basic PDS Principles X-Ref Target -
Page 27 and 28: Basic PDS Principles the two opposi
Page 29 and 30: Basic PDS Principles F RSELF = 53 M
Page 31 and 32: Basic PDS Principles A finite time
Page 33 and 34: PDS Measurements PDS Measurements M
Page 35 and 36: PDS Measurements Figure 2-10 shows
Page 37 and 38: Troubleshooting Optimum Decoupling
Page 39 and 40: Chapter 3 SelectIO Signaling Interf
Page 41 and 42: Chapter 4 PCB Materials and Traces
Page 43 and 44: Traces Traces Trace Geometry For an
Page 45 and 46: Traces Trace Routing Plane Splits R
Page 47 and 48: Chapter 5 Design of Transitions for
Page 49 and 50: BGA Package BGA Package The results
Page 51 and 52: SMT Pads X-Ref Target - Figure 5-7
Page 53 and 54: Differential Vias X-Ref Target - Fi
Page 55 and 56: Differential Vias X-Ref Target - Fi
Page 57 and 58:
Microstrip/Stripline Bends X-Ref Ta
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Microstrip/Stripline Bends X-Ref Ta
Page 61 and 62:
Chapter 6 I/O Pin and Clock Plannin
Page 63 and 64:
PCI All supported MCB interfaces (w
Page 65 and 66:
Global and I/O Clocking A GCLK pin
Page 67 and 68:
Power Management—Using Suspend/Aw
Page 69 and 70:
Appendix A Recommended PCB Design R
Page 71 and 72:
Recommended PCB Design Rules for BG
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