If you always have one 'page' on, the MPX speed does not have any effect (if it is <1MHZ)

one page is not always on, only one row is MPXed. one more thing i need to know, where do we need speed of 100Hz? In multiplexing one page or multiplexing each row?

should i use timer interrupt for displaying rows? as i m already using timer to display cursor in edit mode. everything is working fine except flicker(This may be the main thing).

Regards,
Farrukh Lodhi.