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TMS320F28379D: IQ math in the above processor

Part Number: TMS320F28379D


Dear Sir, 

I have a query for FPU unit Processor. I want to ask that If the above processor has FPU unit so I am assuming that this processor is more precise in floating point calculation instead of IQ math. But If I go to the example given by TI for this processor, the examples use the IQ math maximum times. 

So I am a little bit confused that should I have to start development using FPU unit or using IQ math while I am using per unit convention. 

Even for motor control example for FPU based processor has IQ math calculation. 

Please clear it for me.

Ashutosh Bhatt