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PCB layout for the DM355

I have a customer wanting more info on PCB layout for the TMS320DM355ZCEAQ16.  His question is how to layout the BGA array without using micro vias.  we apparently make a reference in our materials that a DM355 layout doesnt need to use microvias. Do we have any documentation on how this is done? He would like to avoid vias in the pads as well if possible.

thanks for any info

Steve Tomassetti

AFAE TI.