Forums - AIO port

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AIO port
sugie
Join Date: 2 Dec 17
Posts: 5
Posted: Sat, 2017-12-02 19:23

Hi

I'm using AIO[1] of CR1010 to read the voltage of the analog output sensor.

When AIO[1] level is more than 1V, I observed the ripple voltage at AIO[1].

For example, when 1.2V is applied to AIO[1], the oscilloscope shows that

the voltage is 1V and sometimes goes up to 1.2V. The timing of 1.2V looks

like syncronizing with RF working.

Is there any ristriction to use AIO port of CR1010? I believe that I can apply

up to 1.35V to AIO port.

 

Thanks,

Neil Sugie

 

 

 

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Dr. Nissim Zur
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Join Date: 6 Jun 16
Location: Skype: nissim.test CSR1010 External design house
Posts: 235
Posted: Sat, 2017-12-02 22:06

From your post, it is not clear if the CSR1010 send 1V output. Or it reads as input external 1 V.

In any case, it is acceptable that when CSR1010 reads AIO as ADC input. the external wire will get RF enveloped repeal. 

You can avoid that by better GND around AIO line. 

You can call my Skype nissim.test

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sugie
Join Date: 2 Dec 17
Posts: 5
Posted: Sun, 2017-12-03 04:13

Nissim

Thank you for your comments.

I'm using AIO as input. The external voltage is 1.2V, however the oscilloscope shows 1.0V at AIO port.

When RF works, it goes to 1.2V at a moment.

 

Thanks,

 

 

 

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