3 Replies Latest reply on Apr 23, 2018 7:47 AM by e.pratt_1639216

    Routing clock to pin in low power mode


      Is there any way around GPIO pins being frozen during deep sleep or do you have to use the higher current Sleep mode if you want to keep an output pin active?


      I need to produce a 31.25 khz output signal on a pin continuously for an external IC because the crystal I was using on that IC is becoming obsolete.


      The project currently puts 4200 into deep sleep, wakes to process for short time and goes back to sleep.


      I could live with up to 1mA consumption (though less is better). Sleep mode seems to be around 1.5 to 3.7mA if I use internal osc at 3MHz.