Nrf52840 Custom Board Program Booting error

RE: Nrf52840 Custom Board Program Booting error

Sigurd — Tue, 20 Aug 2019 16:41:02 GMT

[quote userid="82410" url="~/f/nordic-q-a/50957/nrf52840-custom-board-program-booting-error/204821"]The Reset pin is 0 volts. [/quote]

When using the SDK examples, the reset pin is by default enabled and set high. I assume you measured at point 2 on the SW_DIP_x01 ? If yes, could it be that you have a short at the reset pin or at SW_DIP_x01 ?

RE: Nrf52840 Custom Board Program Booting error

Quantum_Quail — Mon, 19 Aug 2019 14:28:28 GMT

Hi,

Sorry for the late reply. I'm using SDK 15.3.0 and custom code that just toggles an LED using nrf_gpio. The power source is a benchtop supply and VDD is 3.3. I'm using a Jlink and I have been adding -r to soft reset the device after programming. The Reset pin is 0 volts.

RE: Nrf52840 Custom Board Program Booting error

Sigurd — Wed, 14 Aug 2019 14:16:47 GMT

Hi,

What tools are you using to flash the nRF52840? If you are using nrfjprog, try to add the -r argument in order to soft reset the device after programming.

What SDK version and SDK examples are you testing ?

What is the power source, and what is the value of VDD ?

What is the voltage at P0.18/RESET ?

What programmer/debugger are you using ? J-Link from a nRF52840-DK ?