Excitation Timing Signal (TIM Output)

This signal indicates that the excitation sequence is in the initial state and is provided as a function of the driver. This is output each time the motor rotates 7.2˚.

Whenever a stepper motor is turned on, it excites a specific motor winding to hold the shaft.
The excitation at this time is called the initial excitation state. When the pulse enters, the excitation timing signal (TIM output) is turned off because it is no longer in the initial excitation state.
When the motor shaft rotates 7.2˚, the excitation sequence is again in the initial excitation state.
Therefore, the excitation timing signal (TIM output) is output 50 times per motor shaft revolution (360˚ ÷ 7.2˚ = 50 times).