Dear all,
The DC/DC output is enabled through the EN pin. I have an MCU connected to the output of the DC/DC so obviously if EN isn't high, then the MCU has no power.
My idea to implement "pushbutton" enabling of the entire system was to connect the EN pin to an output of the MCU through a 1K series resistor and a secondary resistor connected to a pushbutton in series with B+.
When the system is off, the pushbutton would pull the EN pin high and start the DC/DC converter and the MCU. Once the MCU is online it's output would go high and latch the EN high so the pushbutton can be released by the user. The MCU can then determine when to shut itself off according to the programming.
Does this seem like a sound approach or am I missing something? I have attached an example layout of what I'm talking about. BQ_EN goes to MCU output.
Kind regards,
Rob
