nRF52840 RESET pin grounded

RE: nRF52840 RESET pin grounded

Jared — Fri, 20 Dec 2024 09:21:22 GMT

Great, keep me posted,

regards

Jared

RobHel — Thu, 19 Dec 2024 15:09:44 GMT

Yea I think that is the next step. I'll respond here when that gets done

Jared — Thu, 19 Dec 2024 10:16:57 GMT

Hi,

On a non-working board, could you try replacing the faulty IC with a good IC to determine if the problem follows the chip?

regards

Jared

RobHel — Wed, 18 Dec 2024 16:07:30 GMT

Hello.

1. FW has been flashed many times on the devices. RESET is enabled (we use it for a low power scenario).

2. Voltage is about 60mV constant.

3. 2 units seen so far of the ~30 or so we've produced

Jared — Wed, 18 Dec 2024 10:13:53 GMT

Hi Rob!

Some questions:

Have you flashed the devices with any fw or are they blank? Is the RESET pin feature disabled in your fw? By default it will be enabled.
If you measure directly on the RESET pin pad, is the voltage at 0V or does it float a bit over that?
What percentage of devices produced do you see this issue on?

regards

Jared