Preface: About This Guide8 www.xilinx.com SP605 Hardware User GuideUG526 (v1.9) February 14, 2019This guide describes the clocking resources available in all Spartan-6 devices,including the DCMs and PLLs.• Spartan-6 FPGA Block RAM Resources User GuideThis guide describes the Spartan-6 device block RAM capabilities.• Spartan-6 FPGA GTP Transceivers User GuideThis guide describes the GTP transceivers available in the Spartan-6 LXT FPGAs.• Spartan-6 FPGA DSP48A1 Slice User GuideThis guide describes the architecture of the DSP48A1 slice in Spartan-6 FPGAs andprovides configuration examples.• Spartan-6 FPGA Memory Controller User GuideThis guide describes the Spartan-6 FPGA memory controller block, a dedicatedembedded multi-port memory controller that greatly simplifies interfacingSpartan-6 FPGAs to the most popular memory standards.• Spartan-6 FPGA PCB Designer’s GuideThis guide provides information on PCB design for Spartan-6 devices, with a focus onstrategies for making design decisions at the PCB and interface level.Additional Support ResourcesTo search the database of silicon and software questions and answers or to create atechnical support request in the Request Portal, see the Xilinx website.