You should not need an ext driver or priority interrupts for a basic muxed display. Start by sketching out the circuit. Rough out the code flow to output seg patterns while selecting the appropriate digit. Do one digit per interrupt. Even at moderate clock rates you'll have plenty of time to refresh the display and still get other processing done.Thank you for the answers. But then, is it better to use external driver for display, instead of refreshing all the time. And If the code is more complex, then I need to use priorities?
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