Tiny210 LCD Connector

We worked before with your module micro2440 and now we aimed to work with
your module tiny210v2. I noticed that among the main signals used with the
LCD_Connectors in all your SDK modules we have the PWM signal and Interrupt
signal (see attached image). With the tiny210V2 module we will use a
capactive touch pad screen. I would like to know if it's obligatory to use
the two signals "PWM" and "Interrupt" or no? Could you tell me what's
exactly the importance of these signal in the LCD_Connector?

Thanks,