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BF525 pinout question

Question asked by JWB88 on Feb 4, 2010
Latest reply on Feb 4, 2010 by JoeT

In the ADSP-BF52x Data Sheet for the 289 CSP_BGA pin assignments, pins T17 and U17 are shown as VDDext. 

In the ADSP-BF527 EZ-Kit Lite schematic they are named "EVDD_VREG" and "EVDD_VREG_N" and are connected to the 3.3V regulator output.

What is the function of these pins?

 

Also, one of the ground pins is connected to gound through a 10K resistor (GND54 on pin T22).  What is the purpose of this?

 

Are these for compatibility with another version?

 

Thanks,   JB

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