I am working on a silabs C8051 MCU. It has a sleep mode which should be woken up by a reset. The mcu should start working (wake up from sleep) when the button in connected to Ground (Otherwise it is on the air). What is the easiest way to give a reset signal to the reset pin (or any other way) to restart the MCU?

  • \$\begingroup\$ ...a pcb trace? \$\endgroup\$ – Hearth Feb 7 '19 at 4:40
  • 1
    \$\begingroup\$ define easiest .... also, what does this mean? Otherwise it is on the air \$\endgroup\$ – jsotola Feb 7 '19 at 5:32

You usually pull the reset pin for 2 machine cycles to reset the 8051 Microcontroller. You could do that easily using a push button, as per the following circuit.


simulate this circuit – Schematic created using CircuitLab

This would straight away, work.

But if you wish to have a better more universal reset button, you could follow the following schematic.


simulate this circuit

Both will do the job.

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