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TMS320F28035 control card,LD1、LD2、LD3

Hi,

I'm using the HV SOLAR DCDC development_kits.When I press the "debug"

 button and press the "run" button ,I found out the F28035 control card's LD3  flash in every 0.5s and LD2 always off.

What is it mean ? Is the phenomenon correct ?