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UCD9222 & UCD7242 problem

 

Hi,

I'm now debugging our C6678 board. We use UCD9222 & UCD7242 for DSP core power supply. Our design is almost the same with the EVMC6678L, so we use the same configuration file as the EVM.

Now we are able to download the configuration to UCD9222 through the USB-TO-GPIO tool. But it does not work. The PWM outputs of UCD9222 stay low. (I did the same download  process on the EVM, and that's OK. )

So I wander did I miss something? What key points should I consider when debugging the UCD9222?  Attached our schematic and .xml file .(We only soldered the power section of our board for debug)

Any help / suggestion would be greatly appreciated!

Han

8883.power_ucd.pdf

8182.UCD9222_Shannon_EVM_Project_16May11_ver5.xml

 

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