nrf52832 RADIO peripheral stopped after days on test bench

RE: nrf52832 RADIO peripheral stopped after days on test bench

ketil — Mon, 12 Feb 2018 09:08:21 GMT

The voltage difference is within range as far as I can tell. How is the 3.7V battery connected to the nRF52832?

RE: nrf52832 RADIO peripheral stopped after days on test bench

Otavio Borges — Mon, 05 Feb 2018 12:17:34 GMT

We programmed some of the boards using a nrf52-DK. We measure the voltage supply from the board and it was around 2.7V while the target was at 3.6V. Could this ~0.9V difference between programmer and target be the cause of the problem? (We used P20 header from DK, VTG short-circuited with DK VDD, board and target GNDs short-circuited, and SWDIO and SWCLK connect between board and target)

RE: nrf52832 RADIO peripheral stopped after days on test bench

ketil — Mon, 05 Feb 2018 08:17:09 GMT

Thanks for the update. Any more news on this issue?

RE: nrf52832 RADIO peripheral stopped after days on test bench

Otavio Borges — Fri, 02 Feb 2018 13:39:47 GMT

Further update:

One of the boards that presented such defect had a increased current on System OFF mode. Healthy devices present with ~3uA on System OFF (additional ICs on the board add up to the 1.2uA from the nrf52), however the defective device presented around 11uA.

As described earlier, the device seemed to run the code normally aside from having no BLE activity.

RE: nrf52832 RADIO peripheral stopped after days on test bench

Otavio Borges — Mon, 29 Jan 2018 14:38:59 GMT

@Ketil - I can't upload the schematics, but will enter in contact directly with nordic personnel. Nevertheless we followed the guidelines from the datasheet. @Matt - Not regularly, but eventually there are flash writing. I've reserved a flash page to store custom FW data. Usually writings are done when a not expected reboot happens, I use neither fstorage or pstorage but rather nvmc and sd_flash_* HAL functions.

RE: nrf52832 RADIO peripheral stopped after days on test bench

Matt — Mon, 29 Jan 2018 13:48:02 GMT

Do you write to some internal flash location regularly? Can it be internal flash failure?

RE: nrf52832 RADIO peripheral stopped after days on test bench

ketil — Mon, 29 Jan 2018 12:36:38 GMT

Could you please attach PCB schematics? If you do not want to share your design openly I advice you to open a confidential MyPage account and register your question there.

RE: nrf52832 RADIO peripheral stopped after days on test bench

Otavio Borges — Mon, 29 Jan 2018 11:28:37 GMT

Is a internal design, we are on final stages of prototyping and the final product should be release this year. We had no such problem on prior testing. The only change on this batch are the batteries.

RE: nrf52832 RADIO peripheral stopped after days on test bench

Matt — Sat, 27 Jan 2018 02:40:19 GMT

Who designed the custom board?