Microcontroller with configurable logic peripheral

A method of operating a microcontroller comprising a central processing unit, memory, I/O ports and a plurality of peripheral units, wherein one of the peripheral units is a configurable logic cell, wherein the configurable logic cell is formed by a look-up table formed by a plurality of memory cells receiving a predefined number of input address signals and generating an output signal and wherein the central processing unit is configured to directly provide input address signals for the look-up table, the method comprising:

• configuring the look-up table by loading predefined data into memory cells of the look-up table;
• selecting address signals from internal signals provided by the peripheral units and external signals provided by at least one external pin;
• buffering the selected address signals in a register or latch.