Re: Recommendations for a Quadrature Decoder IC or MicroController


"benn" <benn686@xxxxxxxxxxx> wrote in message
news:33157349-c306-4837-a17c-23a8d245bfa3@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
I have an atmega16 that interfaces to a motor with a quadrature
encoder sensor. Turns out the frequency of the pulses are much more
than my little 4Mhz can handle (the micro does other things as well!)
As a result, the motor control isn't very accurate, nor does it react
very fast.

SO.. I'm looking for either a quadrature decoder IC that can take the
load off (will calculate position/velocity and interface to a host
micro via serial/parallel bus), OR, a beefy microcontroller with built-
in decoders (and pwm output). 32-bit with lots of GPIO is ideal if
going the microcontroller route.


Hello Benn,

Look at ST Cortex High Density parts:

fits your spec quite well, has quad decoders, motor control timer stuff,
reasonably large RAM and Flash, 144 pin parts if you neeed a lot of IO.


I hope they work OK because I have just designed one into a new project but
the boards are not built yet (about 2 weeks away).

Michael Kellett

www.mkesc.co.uk


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