Description: CPLD-based time clock chess competitions, a CNT60 achieve seconds timing, CNT60 second minute of time to achieve functional, CTT3 completion of the two-hour time function. Module seconds into time- and-switch K1 phase minutes for a time module can be enabled When seconds time to time module to the 59 minute time rounding module, reset themselves. Similarly minute time module to the 59-hour time CTT3 module rounding to 1 hour 59 minutes 59 seconds, reset all. Meanwhile, switches K1 can be suspended within two hours time module seconds, minutes and hours of time metering module module. The module VHDL is described as follows :
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