Using 3.3 volt logic with the VNH3SP30-E

in order to get a stable data flow and handshaking between processor and vhn3sp30 You ust use 74lvc244 at the output of processor . This logic has 5 v tolerant 3.3v compatible structure. And then you must connect 74hct244 at the output of 74lvc244 to shift 3.3v logic to 5 volt. This is true only for data flow from processor to your device. in case data flow from device to processor needles to use 74hct244.