AnsweredAssumed Answered

ADAU1701 can detect input signal?  to driver a led?

Question asked by michaelc21 on Nov 2, 2010
Latest reply on Dec 3, 2012 by amxguru@gmail.com

Hello,

      Now, I am using ADAU1701 to design a  Sound equipment.

      I am going to make a function: when there is  signal input, or adjust add the volume,  then, ADAU1701 turn on  a LED.

 

       While there is no signal input ,or the volume is very low, turn off the LED.

 

        May be the output pin didn't  just drive a LED, but link to MCU, to wake up  MCU from Sleep mode.

 

        There is Signal input, the MCU working, while no signal,MCU go into sleep mode.

 

       To light a led is no problen, using a gpio pin of output  is ok.

 

         But how to  detect the input signal? Now I have no idea. 

 

         I used the RTA OUPUT, and Limiter , they seemed not  OK.

 

         Thank you!

Outcomes