Final answer:
To control a servo motor with a microcontroller, the essential feature needed is a Pulse Width Modulation (PWM) pin. PWM allows precise control over the servo's position, making it the most important feature for servo actuation.
Step-by-step explanation:
When selecting a microcontroller for use with a servo motor, the most important feature to include is a Pulse Width Modulation (PWM) pin. To control a servo motor with a microcontroller, the essential feature needed is a Pulse Width Modulation (PWM) pin. PWM allows precise control over the servo's position, making it the most important feature for servo actuation. PWM is a technique for creating a modulated signal with a variable pulse width, which is ideal for controlling servo motors.
Servo motors have a control line that accepts PWM signals to determine the position of the motor shaft. Therefore, a PWM pin on the microcontroller is crucial for precise control of the servo's position. While other features like GPIO pins, I2C pins, and Analog to Digital converters might also be useful for various peripheral functionalities, for servo motor control, specifically, PWM is the key requirement.