The frequency divider can find all frequencies of 1-- 100000000Hz, based on the SPARTAN -3e board of xilinx company. -Based on SPARTAN-3E of xilinx, using ISE and VHDL, I developed the cysteter.

cysteter
........\.lso
........\constrain.ucf
........\count10.vhd
........\count_circle.bgn
........\count_circle.bit
........\Count_circle.bld
........\Count_circle.cmd_log
........\count_circle.drc
........\Count_circle.fdo
........\Count_circle.lso
........\Count_circle.ncd
........\Count_circle.ngc
........\Count_circle.ngd
........\Count_circle.ngr
........\Count_circle.pad
........\Count_circle.par
........\Count_circle.pcf
........\Count_circle.prj
........\Count_circle.ptwx
........\Count_circle.stx
........\Count_circle.syr
........\Count_circle.twr
........\Count_circle.twx
........\Count_circle.udo
........\Count_circle.unroutes
........\Count_circle.ut
........\count_circle.vhd
........\Count_circle.xpi
........\Count_circle.xst
........\Count_circle_guide.ncd
........\Count_circle_map.map
........\Count_circle_map.mrp
........\Count_circle_map.ncd
........\Count_circle_map.ngm
........\Count_circle_map.xrpt
........\Count_circle_ngdbuild.xrpt
........\Count_circle_pad.csv
........\Count_circle_pad.txt
........\Count_circle_par.xrpt
........\Count_circle_prev_built.ngd
........\Count_circle_summary.html
........\Count_circle_summary.xml
........\Count_circle_usage.xml
........\Count_circle_vhdl.prj
........\Count_circle_wave.fdo
........\Count_circle_xst.xrpt
........\cysteter.gise
........\cysteter.ise
........\cysteter.ntrc_log
........\cysteter.xise
........\cysteter_xdb
........\............\cst.xbcd
........\............\tmp
........\............\...\ise
........\............\...\ise.lock
........\............\...\...\version
........\............\...\...\__OBJSTORE__
........\............\...\...\............\Autonym
........\............\...\...\............\common
........\............\...\...\............\ExpandedNetlistEngine
........\............\...\...\............\HierarchicalDesign
........\............\...\...\............\..................\HDProject
........\............\...\...\............\..................\.........\HDProject
........\............\...\...\............\..................\.........\HDProject_StrTbl
........\............\...\...\............\..................\__stored_object_table__
........\............\...\...\............\PnAutoRun
........\............\...\...\............\.........\Scripts
........\............\...\...\............\.........\.......\RunOnce_tcl
........\............\...\...\............\.........\.......\RunOnce_tcl_StrTbl
........\............\...\...\............\ProjectNavigator
........\............\...\...\............\ProjectNavigator11
........\............\...\...\............\ProjectNavigatorGui
........\............\...\...\............\...................\CViewSelector
........\............\...\...\............\...................\CViewSelector_StrTbl
........\............\...\...\............\...................\File-SynthesisOnly
........\............\...\...\............\...................\File-SynthesisOnly_StrTbl
........\............\...\...\............\...................\Library-SynthesisOnly
........\............\...\...\............\...................\Library-SynthesisOnly_StrTbl
........\............\...\...\............\...................\Process-BehavioralSim-
........\............\...\...\............\...................\Process-BehavioralSim-DESUT_VHDL_ARCHITECTURE
........\............\...\...\............\...................\Process-BehavioralSim-DESUT_VHDL_ARCHITECTURE_StrTbl
........\............\...\...\............\...................\Process-BehavioralSim-_StrTbl
........\............\...\...\............\...................\Process-SynthesisOnly-
........\............\...\...\............\...................\Process-SynthesisOnly-DESUT_UCF
........\............\...\...\............\...................\Process-SynthesisOnly-DESUT_UCF_StrTbl
........\............\...\...\............\...................\Process-SynthesisOnly-DESUT_VHDL_ARCHITECTURE
........\............\...\...\............\...................\Process-SynthesisOnly-DESUT_VHDL_ARCHITECTURE_StrTbl
........\............\...\...\............\..........

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