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tlv320aic23 Digital High Pass Filter Problem

Started by Brian C. Lane February 18, 2002
I have just found (I think) a problem with the TMS320AIC23 codec. If I
select the Digital high pass filter (set the control bit to a 1) I am
seeing an offset of about -1000 from the codec. If I set this to a 0
it centers itself on 0. This is backwards from what the datasheet
reads.

Brian

-----------------
Brian C. Lane (KC7TYU) Programmer
www.shinemicro.com RF, DSP & Microcontroller Design




On Mon, 18 Feb 2002 11:03:43 -0800, you wrote:

>I have just found (I think) a problem with the TMS320AIC23 codec. If I
>select the Digital high pass filter (set the control bit to a 1) I am
>seeing an offset of about -1000 from the codec. If I set this to a 0
>it centers itself on 0. This is backwards from what the datasheet
>reads.

And to reply to myself, yes this is a difference from the datasheet. I
heard back from a TI tech and he confirmed this. Sure would be nice if
they would update their documentation more frequently.

Brian

-----------------
Brian C. Lane (KC7TYU) Programmer
www.shinemicro.com RF, DSP & Microcontroller Design