Marcellus Pereira

VDDM voltage problem

Discussion created by Marcellus Pereira on Aug 16, 2012
Latest reply on Mar 7, 2014 by Pierre Parent

Hi guys!

 

After some problems, I could finally assemble my i.MX233 board.

 

In the first test, however, it doesn't boot. The VDDM, connected to VDDIO_DRAM (as in the EVK) remains at zero Volts. When connected to USB, the PC "sees" the board, and the MfgTool shows "HID-Compliant Device", but it fails to upload the images.

 

The Debug UART shows the following:

 

"HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC

PowerPrep start initialize power...
Battery Voltage = 0.82V
No battery or bad battery detected!!!.Disabling battery voltage meHTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC
PowerPrep start initialize power...
Battery Voltage = 0.82V
No battery or bad battery detected!!!.Disabling battery voltage me" and goes on.

 

I'm using the internal regulators and the 3.3V line is ok, as the 1.2V line. Only the 2,5V remains in zero Volts.

 

Am I missing something?

 

Thank you very much,

 

Marcellus Pereira

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