AnsweredAssumed Answered

AD1937 MCLK in Stand Alone Mode

Question asked by dramsay on Aug 3, 2012
Latest reply on Aug 8, 2012 by ColemanR

Hey all,


I'm trying to hook up a AD1937 in stand alone mode to a ADSP-21262, with a 11.2896 MHz crystal oscillator connected to the DSP.


I know that in stand alone mode everything is in default, which should be fine with a little programming in software and connecting it all up to the ADSP's DAI.


My question is about the MCLK- I obviously want that 11.2896 MHz connected to the MCLKI pin to drive 44.1k audio.  I assume that hooking it up to the DAI of the ADSP I can easily drive that signal through to MCLKI.  However, the MCLKO defaults to 'XTAL osc enabled'.  Do I need to tie this pin to ground, or not connect it at all?  I'm a bit of a newbie, and I wasn't sure if the XTAL oscillator enabled meant that I needed to hook up a crystal differentially over these two pins.  Can I just drive MCLKI with the DSP in stand alone mode?