Need help with a DAC (Wolfson -WM8718)

Thread Starter

Piro

Joined Oct 30, 2009
3
Hello, I am working on a project.
I am trying to connect a microcontroller (PIC24fj256ga110 from microchip )
ww1.microchip.com/downloads/en/DeviceDoc/39905b.pdf
to a digital to analog converter (Wolfson WM8718)
http://pdf1.alldatasheet.com/datasheet-pdf/view/107576/WOLFSON/WM8718.html

( I chose this DAC because it seemed like it would give me a better audio output then the others I found, and the audio output is important for me at the moment. I will change the PIC to a DSPic, but I am only at the testing period right now
)

I am slightly confused because this is the first DAC I have worked with that has a serial data input instead of parallel data inputs.
as you can see from the schematic I drew, I figured out most of it ( or at least I think I have
)

DIN I guess I can connect it straight to an I/O of the microcontroller,
the SDIN to the "SDOx: Serial Data Output" of the microcontroller (page 171) And
SCLK to "SCKx: Shift Clock Input or Output" of the microcontroller (page 171 of the microcontroller datasheet).
But I have a hard time figuring out where to connect the Latch pin ( pin 13 of the D/A)

....LRCIN, MCLK, BCKIN, ZeroCR and Zero CL (I am clueless about these pins
)

Do I have to use all these pins ?( from what I understood from the datasheet of the DAC, if I use the software I/F controls I don't have to use the audio serial data interface I/F, but then again I could be mistaken.

Any help would be welcome.

Thank you in advance for any advice and help.


PS: I know I write very small, if anyone has problems reading the image, please notify me, I will clarify any doubts
 

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