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VSP5610: Not able to get proper output

VISHAL KALWANI
Intellectual 705 points
Part Number: VSP5610

Hi,

I configure AFE IN CMOS MODE .

In sh mode 4 channel analog input in 8 bit mode .

Clamp mode select-NON CLAMP AND SHREF_EN=ON

INTERNAL REFERENCE 2V SELECT.

I HAVE CONFIGURE 8Mhz to AFE.And external input apply 1v p-p and 1Mhz Frequency.

In AFE Cap placed at ain pin.and gnd pin are grounded through cap.I have attached the image. 

I am able to capture when i configure SHP_A RISING-0 COUNT,SHP_A FALLING -0 COUNT,SHD_A RISING-0 COUNT,SHD_A FALLING-0 COUNT

And SHP_B RISING-0 COUNT,SHP_B FALLING-7 COUNT,SHD_B RISING- 8 COUNT AND SHD_B FALLING- 14 COUNT. And i apply external analog signal on ch-3 and ch04 of Afe then i could capture.

But when i kept same SHP_A=SHP_B AND SHD_A=SHD_B.THEN I COULD NOT CAPTURE AS I WANT.

I HAVE ALSO TRY SHP_A AND SHP_B OF DIFFERENT VALUE AND SHD_A AND SHD_B OF DIFFERENT VALUE.

I HAVE CALCULATE COUNT ACCORDING TO DATASHEET.

DOES SHD_A and SHD_B SHOULD BE DIFFERENT IF SO THEN HOW MUCH?

DOES SHP_A and SHP_B SHOULD BE DIFFERENT IF SO THEN HOW MUCH?

 

  • 0
    TI__Mastermind 49946 points

    Hello Vishal,

    Thanks for your post. I have also received your questions in my email.

    I am taking it offline and closing this e2e post.

    I just wanted to let you know that I’m checking with my team on your issues and will get back to you before the end of week with an answer.