Hello,
I guess I'm missing something in the documentation. I want to turn-on MIC BIAS and have let's say something greater or equal to 1.25V at MICBIAS output.
On my circuit, I am using a single supply of 3.5V tied to LDO IN pin 26 and IOVDD pin 6.
I also have AVDD pin 24 and DVDD pin 29 coupled to GND through a capacitor. Does the capacitor value here make any difference?
I tied LDO SELECT pin 30 to 3.5V but when I set P1_R51 to the following:
A) 0x58: I get around 0.35V on MIC BIAS;
B) 0x48: I get around 0.32V on MIC BIAS;
C) 0x68: I get around 0.33V on MIC BIAS;
D) 0x78: then I get 3.5V on MIC BIAS;
With the above configuration, the CODEC seems to initialize because I can read and write to registers.
Then I connected LDO SELECT to GND and now, none of the registers can be programmed.
In the documentation page 5 under pin 29, it refers to "D-LDO" being disabled if LDO_SELECT is tied to GND etc. I don't see "D-LDO" anywhere else in the docs.
Other than P1_R51 to configure MIC BIAS, given the power pins described above, are there any other registers I need to set in order to make the CODEC use a single 3.5V supply as described above?
Or perhaps can someone tell me exactly *what pins* need to be set to *what level* and *which registers* need to be configured (how?) in order for me to use a single 3.5V supply AND use MIC BIAS out.
Thanks for any help, sorry for the confusion!
Benoit
