Clock reset load enable
^ low low high
Clock reset enable load
^ off on on
What is meaning of preset, I think suppose counter is preset with 6 decimal(0110) number. counter start to count from 6,7,8,9,10,11,12,13,14,15 than again count from 6,7...15I think so, but you should either use low/high or on/off. Don't mix the two values sets. It can get confusing.
You can make a single counter chip have any modulus you want. For example you could do a modulo 3 counter with states 7,8, and 9. You decode state 9 and load state 7. If you want to be really slick then you decode all the illegal states and load state 7. Counter chips are very flexible in this regard.If you do a preset to 6, the counter will go 6,7,8,...,14,15,0,1,2,..,15,0,1,2,... if you want to go again from 6 you´d need to do the preset again every time you reach 15.
As you can see in the internal diagram, the counter has only one set of flipflops that are used to hold the count, so there is no way it could remember that you want it to allways start beginning with 6.
by Jake Hertz
by Jake Hertz
by Jake Hertz
by Aaron Carman