UCD9222 & UCD7242 problem

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Posted by haopeng han

on Nov 04 2011 10:13 AM

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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Posted by Vladimir Podgoretskiy

on Aug 02 2012 08:43 AM

Intellectual570 points

Our DPWM output is also low (3-state). Configuration data to UCD (9244) was trasmitted over PMBus by EVMc6678 board and validated by reading it back. DPWM output is quite.

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