Assume that the system clock to 50MHz, the design of an electronic stopwatch test circuit, so the step by 0.01s to time. The electronic stopwatch with asynchronous clear and start/stop counting, the largest of Total to 59.99s, with digital display counts. With LED display into the digital signal to the minute.

Timer
.....\bcdcnt.bsf
.....\bcdcnt.v
.....\bcdcnt.v.bak
.....\bcdcnt.vwf
.....\button.bsf
.....\button.v
.....\button.v.bak
.....\clkdiv.bsf
.....\clkdiv.vwf
.....\clkdiv10.bsf
.....\clkdiv10.v
.....\clkdiv10.v.bak
.....\clkdiv100.bsf
.....\clkdiv100.v
.....\clkdiv100.v.bak
.....\clkdiv5000.bsf
.....\clkdiv5000.cvwf
.....\clkdiv5000.v
.....\clkdiv5000.v.bak
.....\db
.....\..\add_sub_3dc.tdf
.....\..\add_sub_4dc.tdf
.....\..\add_sub_4rh.tdf
.....\..\add_sub_59c.tdf
.....\..\add_sub_5dc.tdf
.....\..\add_sub_5rh.tdf
.....\..\add_sub_6dc.tdf
.....\..\add_sub_7dc.tdf
.....\..\add_sub_89c.tdf
.....\..\add_sub_8dc.tdf
.....\..\add_sub_8rh.tdf
.....\..\add_sub_9dc.tdf
.....\..\add_sub_adc.tdf
.....\..\add_sub_bdc.tdf
.....\..\add_sub_iac.tdf
.....\..\add_sub_jec.tdf
.....\..\add_sub_kec.tdf
.....\..\add_sub_ksh.tdf
.....\..\alt_u_div_4oe.tdf
.....\..\alt_u_div_4re.tdf
.....\..\alt_u_div_ite.tdf
.....\..\alt_u_div_oqe.tdf
.....\..\alt_u_div_ote.tdf
.....\..\alt_u_div_uqe.tdf
.....\..\alt_u_div_vqe.tdf
.....\..\lpm_divide_1vl.tdf
.....\..\lpm_divide_58m.tdf
.....\..\lpm_divide_80m.tdf
.....\..\lpm_divide_88m.tdf
.....\..\lpm_divide_b0m.tdf
.....\..\lpm_divide_e5m.tdf
.....\..\lpm_divide_r6m.tdf
.....\..\lpm_divide_rul.tdf
.....\..\lpm_divide_uul.tdf
.....\..\lpm_divide_vul.tdf
.....\..\prev_cmp_Timer.asm.qmsg
.....\..\prev_cmp_Timer.fit.qmsg
.....\..\prev_cmp_Timer.map.qmsg
.....\..\prev_cmp_Timer.qmsg
.....\..\prev_cmp_Timer.sim.qmsg
.....\..\prev_cmp_Timer.sta.qmsg
.....\..\prev_cmp_Timer.tan.qmsg
.....\..\sign_div_unsign_1nh.tdf
.....\..\sign_div_unsign_4nh.tdf
.....\..\sign_div_unsign_akh.tdf
.....\..\sign_div_unsign_klh.tdf
.....\..\sign_div_unsign_nlh.tdf
.....\..\sign_div_unsign_olh.tdf
.....\..\sign_div_unsign_qlh.tdf
.....\..\Timer.asm.qmsg
.....\..\Timer.cbx.xml
.....\..\Timer.cmp.bpm
.....\..\Timer.cmp.cdb
.....\..\Timer.cmp.ecobp
.....\..\Timer.cmp.hdb
.....\..\Timer.cmp.logdb
.....\..\Timer.cmp.rdb
.....\..\Timer.cmp.tdb
.....\..\Timer.cmp0.ddb
.....\..\Timer.cmp_bb.cdb
.....\..\Timer.cmp_bb.hdb
.....\..\Timer.cmp_bb.logdb
.....\..\Timer.cmp_bb.rcf
.....\..\Timer.dbp
.....\..\Timer.db_info
.....\..\Timer.eco.cdb
.....\..\Timer.eds_overflow
.....\..\Timer.fit.qmsg
.....\..\Timer.fnsim.hdb
.....\..\Timer.fnsim.qmsg
.....\..\Timer.hier_info
.....\..\Timer.hif
.....\..\Timer.map.bpm
.....\..\Timer.map.cdb
.....\..\Timer.map.ecobp
.....\..\Timer.map.hdb
.....\..\Timer.map.logdb
.....\..\Timer.map.qmsg
.....\..\Timer.map_bb.cdb

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