An example of a driving circuit using a dedicated integrated chip PMM8713 is shown in the figure. The motor speed is determined by the input pulse frequency at the Ck terminal. When the U/D terminal inputs 0 or 1, the motor is rotated forward or reversed, and the pulse signal is applied to control the motor. When inverting, use Cc and Cd terminals, and Cr and U/D terminals connected to Vss.PMM8713 input terminal Φc is to determine motor phase number, Φc=0 for 3 phases, Φc=1,5 phase for 4 phases When using PMM8714.Ea and 0, Eb is the excitation mode, Ea=Eb=1 for 2-phase excitation, Ea=Eb=1 for 1-2 phase excitation, Ea=0, Eb=1 for 1-phase excitation. Or Ea=1, Eb=0, the output current of the PMM8713 is small, so the current amplifier circuit should be connected when driving the motor. China Base Stations Antennas,High gain Base Stations Antennas.Factory Price Base Stations Antennas Panel Antenna,Yagi Antenna.Directional Antenna,Parabolic Dish Antenna,parabolic grid antenna Yetnorson Antenna Co., Ltd. , https://www.xhlantenna.com