nrf51822 Chip wont restart after battery is below the operating voltage and get recharged(buttonless design)

RE: nrf51822 Chip wont restart after battery is below the operating voltage and get recharged(buttonless design)

harry4951 — Mon, 16 Dec 2019 15:22:33 GMT

Problem solved, thank you!

RE: nrf51822 Chip wont restart after battery is below the operating voltage and get recharged(buttonless design)

ketiljo — Mon, 16 Dec 2019 14:14:22 GMT

Try connect a 1M resistor between SWDIO and ground. The reset function of the SWDIO pin will be upset when the voltage drops.

RE: nrf51822 Chip wont restart after battery is below the operating voltage and get recharged(buttonless design)

harry4951 — Fri, 13 Dec 2019 14:07:49 GMT

Hi, this post is different from the question I posted in the private channel. This is the design with non-rechargeable battery.

The issue was found out from the rechargeable solution but since I dont have the hardware at hand. I had to use the previous design, which I had hardware sample at hand. But in the end this non-rechargeable solution has the same issue. I used power supply to connect with BAT P1 P2, lower the voltage and increase back to the normal voltage, the system wont restart unless I disconnect the cable and reconnect.

RE: nrf51822 Chip wont restart after battery is below the operating voltage and get recharged(buttonless design)

ketiljo — Fri, 13 Dec 2019 13:56:55 GMT

There's no reason for the nRF51 to stop working at 2.7 V. I think maybe the regulator is playing with you here. Try to bypass the regulator and see if the error is still present.