Make a 74LS193 Synchronous Down Counter Stop at Zero

[blond3d]

Hi, I have created a circuit on multisim live and it counts down from ten to zero, but I can't figure out how to make it stop counting at zero. I think it something with the borrow pin, but I don't know what. Please help

 

[Martaine2005]

Have you looked at the data sheet?

 

[danadak]

Right now you have a divider, so it runs continuously.

One way is to detect 0, the falling edge of the borrow output use that to
stop clock or clk a D to force the counter to hold its CLR input active.
And use the load signal to clear that D.....and restart counter.


Regards, Dana.

 

[danadak]

Take a look at this thread on topic of asynch clear and load related issues :

Need help with fixing my circuit design.

Hi, I am a student and have to design a synchronous counter from 1010 to 0011. For this I am using IC 74193 counter. I attached the picture of my circuit. The logic I followed was that I set counter to 1010 and then counter reaches 0011 it clears it. The issue is that counter doesn't work if CL...

www.electro-tech-online.com

Regards, Dana.