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clock pulse for the MC14489 — Parallax Forums

clock pulse for the MC14489

yarisboyyarisboy Posts: 245
edited 2010-08-21 16:36 in Propeller 1
I'm setting up a little spin code to send a four digit number to subject chip. The data sheet indicates that for my 5 volt Vdd I can send it a frequency from DC to 4.0 MHz. I don't really need extreme speed, I just want to have the minimum of timing problems. Obviously I must set up a counter to an output pin that will run slower than the Prop clock. Any rules of thumb out there.

Comments

  • kuronekokuroneko Posts: 3,623
    edited 2010-08-21 16:22
    yarisboy wrote: »
    Obviously I must set up a counter to an output pin that will run slower than the Prop clock. Any rules of thumb out there.

    Have a look at the Synth.spin object which is available in the PropellerTool library.
  • yarisboyyarisboy Posts: 245
    edited 2010-08-21 16:36
    Yes, I had good results using that object on my desktop Prop based frequency generator. I'll load that object on my project Prop so I can try different clock speeds with the much slower MC14489 and Spin. Thx. Ref post: Preliminary Tachometer Results.
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