The 8051 microcontroller has 5 interrupt signals, namely INT0, TFO, INT1, TF1 and RI/TI. Each interrupt can be enabled or disabled using the bits of the IE register. It is important to note that disabling the EA bit in the same register turns off the whole interrupt system. The programmer should carefully consider which interrupts are necessary for their application before enabling them, as too many of them can interfere with its performance. An efficient and reliable controller can be achieved by managing these interruptions well and assigning priority to them if needed.