[sdiy] Divide by 10^6?

[Antti Huovilainen]

On Thu, 27 Aug 2009, flightofharmony wrote:

> I have a question for the logic & digital folk: is there a
> low-component-count, off-the-shelf way to divide down from 20MHz to 20Hz?

2^20 would be easy, but off by some 5%.
For true 10^6 divide, I'd use a divide by 2/4/8/16 followed by an MCU. 
Most MCUs have external timer input with builtin programmable divider. 
Some can even take 20 MHz input so you don't need the 2^N divider before 
the MCU.

Antti

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