ADuC847 serial download issue.

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?