This design is a stopwatch based on the Verilog HDL. And it has been verified on the platform of Cyclone II s FPGA of Altera. Finally it can achieve accurate timing.

EX4V1.1\db\add_sub_lkc.tdf
.......\..\add_sub_mkc.tdf
.......\..\alt_u_div_kve.tdf
.......\..\alt_u_div_ove.tdf
.......\..\Ex4.amm.cdb
.......\..\Ex4.asm.qmsg
.......\..\Ex4.asm.rdb
.......\..\Ex4.asm_labs.ddb
.......\..\Ex4.cbx.xml
.......\..\Ex4.cmp.bpm
.......\..\Ex4.cmp.cdb
.......\..\Ex4.cmp.hdb
.......\..\Ex4.cmp.kpt
.......\..\Ex4.cmp.logdb
.......\..\Ex4.cmp.rdb
.......\..\Ex4.cmp0.ddb
.......\..\Ex4.cmp1.ddb
.......\..\Ex4.cmp2.ddb
.......\..\Ex4.cmp_merge.kpt
.......\..\Ex4.db_info
.......\..\Ex4.eda.qmsg
.......\..\Ex4.fit.qmsg
.......\..\Ex4.hier_info
.......\..\Ex4.hif
.......\..\Ex4.idb.cdb
.......\..\Ex4.lpc.html
.......\..\Ex4.lpc.rdb
.......\..\Ex4.lpc.txt
.......\..\Ex4.map.bpm
.......\..\Ex4.map.cdb
.......\..\Ex4.map.hdb
.......\..\Ex4.map.kpt
.......\..\Ex4.map.logdb
.......\..\Ex4.map.qmsg
.......\..\Ex4.map_bb.cdb
.......\..\Ex4.map_bb.hdb
.......\..\Ex4.map_bb.logdb
.......\..\Ex4.pre_map.cdb
.......\..\Ex4.pre_map.hdb
.......\..\Ex4.rpp.qmsg
.......\..\Ex4.rtlv.hdb
.......\..\Ex4.rtlv_sg.cdb
.......\..\Ex4.rtlv_sg_swap.cdb
.......\..\Ex4.sgate.rvd
.......\..\Ex4.sgate_sm.rvd
.......\..\Ex4.sgdiff.cdb
.......\..\Ex4.sgdiff.hdb
.......\..\Ex4.sld_design_entry.sci
.......\..\Ex4.sld_design_entry_dsc.sci
.......\..\Ex4.smart_action.txt
.......\..\Ex4.sta.qmsg
.......\..\Ex4.sta.rdb
.......\..\Ex4.sta_cmp.8_slow.tdb
.......\..\Ex4.syn_hier_info
.......\..\Ex4.tis_db_list.ddb
.......\..\Ex4.tmw_info
.......\..\logic_util_heursitic.dat
.......\..\lpm_divide_1dm.tdf
.......\..\lpm_divide_25m.tdf
.......\..\lpm_divide_45m.tdf
.......\..\lpm_divide_vcm.tdf
.......\..\prev_cmp_Ex4.qmsg
.......\..\sign_div_unsign_9kh.tdf
.......\..\sign_div_unsign_bkh.tdf
.......\Ex4.asm.rpt
.......\Ex4.cdf
.......\Ex4.done
.......\Ex4.eda.rpt
.......\Ex4.fit.rpt
.......\Ex4.fit.smsg
.......\Ex4.fit.summary
.......\Ex4.flow.rpt
.......\Ex4.map.rpt
.......\Ex4.map.smsg
.......\Ex4.map.summary
.......\Ex4.pin
.......\Ex4.pof
.......\Ex4.qpf
.......\Ex4.qsf
.......\Ex4.sof
.......\Ex4.sta.rpt
.......\Ex4.sta.summary
.......\incremental_db\compiled_partitions\Ex4.db_info
.......\..............\...................\Ex4.root_partition.cmp.cdb
.......\..............\...................\Ex4.root_partition.cmp.dfp
.......\..............\...................\Ex4.root_partition.cmp.hdb
.......\..............\...................\Ex4.root_partition.cmp.kpt
.......\..............\...................\Ex4.root_partition.cmp.logdb
.......\..............\...................\Ex4.root_partition.cmp.rcfdb
.......\..............\...................\Ex4.root_partition.map.cdb
.......\..............\...................\Ex4.root_partition.map.dpi
.......\..............\...................\Ex4.root_partition.map.hbdb.cdb
.......\..............\...................\Ex4.root_partition.map.hbdb.hb_info
.......\..............\...................\Ex4.root_partition.map.hbdb.hdb
.......\..............\...................\Ex4.root_partition.map.hbdb.sig
.......\..............\...................\Ex4.root_partition.map.hdb
.......\..............\...................\Ex4.root_partition.map.kpt
.......\..............\README
.......\simulation\modelsim\Ex4.sft
.......\..........\........\Ex4.vo

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