Author Topic: Cascading multiple counters  (Read 514 times)

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Offline MoriambarTopic starter

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Cascading multiple counters
« on: April 29, 2021, 02:32:05 pm »
Hello, I'm trying to experiment with '163 counters.
I just want to cascade three of them. Or perhaps more but I'd like to understand how to cascade more than two basically.

I already have two perfectly cascaded:
  • they share the CLK line
  • ENP of counter 2 is connected to RCO of counter 1

The problem is how to cascade the third one: if I share clock and make its ENP connect to RCO of counter 2, that makes it count exactly like counter 1 when counter 2 is in HHHH state.
I really would like to understand what is the "correct" way to cascade more than two counters. I thought about ANDing the two RCO outputs and make those the ENP of counter 3 but it seems like a waste, having to use an extra logic gate/IC (and also: I have to mind about the delay? That won't matter when I count at 1Hz but I plan to take the counters up to 10MHz).

Is there a general way to proceed? IE: what if I want to cascade 10 or 20 counters?

Cheers
 

Offline langwadt

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Re: Cascading multiple counters
« Reply #1 on: April 29, 2021, 02:42:52 pm »
 
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Offline MoriambarTopic starter

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Re: Cascading multiple counters
« Reply #2 on: April 29, 2021, 03:33:12 pm »
https://www.ti.com/lit/ds/symlink/sn54163.pdf page 21
yes! I mixed up enp and ent.
I would've never found that document though, not without a direct link or suggestion. Thanks again
 


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