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DSP28335 PWM initialization

Hello all,

I have an issue relating the initialization with Dead Band. 
The main problem is that when I use the POLSEL with negative selection, I'm not able to initializate the peripheral without any pulse. 

The force register (EPwm1Regs.AQCSFRC.all) is not effective until SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC is 1.

But EPwm1Regs.DBCTL.all is immediatly updated.

Regards.