External power supply issue with nRF52832 EVK(PCA10040)

[suresh473]

Hi,

    I am using nRF52832 development kit to connect to STM32L4 via UART. I flashed ser_s132_uart binary to nRF board and porting the STML0 nRF driver package from here to STML4. If i supply power to nRF52 through USB cable, i am observing the LED(LD5) is turned on, but if give external power supply of 3.3V, the LD5 is turned off. Could anyone tell the reason behind this. I didn't find any thing different with USB and external power supply from the schematics.

Its not just the LED, even the reset button(SW5) is not resetting P0.23 GPIO which is configured as UART Tx.

Warm regards,

Suresh

[chinmaydixit]

Jørgen Holmefjord said:

As described in the documentation, pin reset needs to be enabled on P0.21 on the nRF52832 for the reset button to work. If you have changed the pin number, it might not work.

The document is not available. Can you please provide the legit doc link?

Thanks.

[Jørgen Holmefjord]

Updated link. Please post your questions in a new ticket, instead of resurrecting this 3-4 year old ticket.

[chinmaydixit]

OKay thanks.