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ADuC847 serial download issue.

Question asked by Welltec_SH on Mar 29, 2013
Latest reply on May 13, 2013 by MMA

I have made a PCB with a ADuC847, which is meant to communicate with a ADF7021. The PCB has been design to be a replica of the EVAL-ADF70XXMBZ2 in order to run out-of-tht box with the code from the eval-kit. Somehow, the board is not responding when I try to enter Serial Download mode. The schematic has been added.

 

How do I know the board is running? I have measured the oscillator output and is has a stable frequency. The power supply voltage is 3.36V with a 10mV peak to peak ripple. How much current should be consumed, when the is no code loaded into it?

 

Any suggestions to move forward?

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