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PICList Thread
'Question on HSP45102'
1999\04\01@015649 by Max Prager

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Hi everyone,
I have been playing around with the Harris HSP45102 DDS chip and I am
having a little trouble using it. I am assuming the serial data is being
tranfered from the PIC to the DDS OK because of the fact that when the
data is being transmitted, the DDS outputs 'stuff' (not even close to a
sine wave but is is doing something) and when nothing is being
transfered it outputs nothing. I do not fully understand the way the
registers work in the DDS and cannot find any info on it other than the
data sheet which doent  tell the sequence of events to give me an
output. I know that the ENPHAC, TXFR and LOAD pins play a big part of
the operation but are unsure on how to use them in a proceedure to give
me an sine output.
When I keep them all low it has the above affect and when I play around
with them in my PIC program it usually outputs nothing. Does anyone know
the steps to take to give a sine output on the HSP45102.
Any help will be greatly appreciated

Max

1999\04\02@025447 by andrew abken

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    Hello max,

   Well I cant answer your question directly, but I
subscribe to a magazine called "QST". This is a mag for
ham radio people, and a few months ago I saw an artical
that went into great detail about this IC. I will try
to find it and get back to you.


     andrew


--- Max Prager <spam_OUTmpragerTakeThisOuTspamCYLLENE.UWA.EDU.AU> wrote:
> Hi everyone,
> I have been playing around with the Harris HSP45102
> DDS chip and I am
> having a little trouble using it. I am assuming the
> serial data is being
> tranfered from the PIC to the DDS OK because of the
> fact that when the
> data is being transmitted, the DDS outputs 'stuff'
> (not even close to a
> sine wave but is is doing something) and when
nothing
> is being
> transfered it outputs nothing. I do not fully
> understand the way the
> registers work in the DDS and cannot find any info
on
{Quote hidden}

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