PPMC external UChl 5804 shows four-phase stepping motor drive IC is shown moving down. It uses the P-OUT, ccw / cw and HOLD output. Use UCN5804 9 and 10 pin logic level can
be set up as a two-phase motor tuning step, single-phase full-step, half-step and other incentives in three different sports. In this figure, it was shown by the optocoupler connection between the five limit switches and PPMC.