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Product spec and feature 14. PWM Controller - 4 PWM output ports - THV, BIAS, FAN control and AC ELECTRIFICATION 15. Bi-polar Stepper Motor controller (MOTORC) - Phase generation for the purpose of paper feeding - fixed hardware phase and current table - programmable phase and interval time - Interrupt based phase change operation 16. Timer - 3 Independent Programmable Timers - Watch Dog Timer for S/W Trap 17. Miscellaneous - Mux controlled 24 GPI, 28 GPO & 5 GPIO ports . - Mutual exclusive GPO/GPIO ports control by the port control enable register - Programmable Bus Master Priority. - Project code added. Service Manual 2-18 Samsung Electronics