518822 can't go into sleep mod for current saving

[Songplus]

Hi !

     In order to consume lowest current，we use the function power_manage() ，let the MCU go into sleep，the SD is S130, V1.0，we enable the GPIOTE，watchdog ，ADC ，app_timer，and UART0.Before going into sleep ,we stop(disable)the UART0.We find that sometimes  MCU can go into sleep，but sometimes not. I'm sure that unused IOs are not in float statue. Current sample resister is 5 Ω, the voltage between it is 5~8mV，it meas that current is 1mA.When we debug the program ,find  the internal 16MHz RC osillator is alway running. I *** the power_manage()  does'nt tack affect. How to solutethe problem，our production cann't work in low power mod, it is terrible.There maybe a bug in this chip.

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[Simonr]

There's an issue with the nRF51 series where the power reset might not work to get you out of debug mode. You can try connecting an external resistor to the SWDCLK pin. We have tested with a 470Ohm external resistor which should help here.

You can also check out this current consumption guide for a multitude of ways to reduce current consumption for the nRF51 series. Give them a try and report back if you still can't fix it.

Best regards,

Simon