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2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. ------------8051------ 13. :8051 14. IN1 IN2 IN3 IN40 1 1 1 ------()1 0 1 1 ------()1 1 0 1 ------()1 1 1 0 ------()IN1 IN2 IN3 IN4 0 1 1 11 1 0 10 1 0 11 0 1 0 15. 16. : 17. 18. PWMMG995duty circle 19. MG995 :50hz duty cycle----- > 50hzduty cycle7.5%7.5%1.5ms18.5ms 20. Duty cycle >7.5% Duty cycle