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The data sheet will defines the power supply voltage, which it is either +5V, +3.3V or 1.8V these days. Best is to use a step-down converter to the supply voltage needed. Or a different battery supply which fits the micro supply need.
It is a daily occurrence, to power PCB with uC from 12V, 9V or mobile charger 5V, even with 1,5V. You can power every uC with 1,5V battery as source of power.
How?
In manufacturer datasheet for each part, especially for uC, they give minimum and maximum electrical characteristics, you should read this data.
To get needed voltage 5V from 9V you can use voltage regulator, such as 7805, or to get 5V from 1,5V battery you can use voltage booster....
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