programming custom NRF52840 soc with PCA10056 DK

RE: programming custom NRF52840 soc with PCA10056 DK

alireza sadeghpour — Mon, 30 Sep 2019 21:19:35 GMT

Excuse me.

With connecting VTG to VDD_nRF and removing SB47 jamper problem solved.

RE: programming custom NRF52840 soc with PCA10056 DK

alireza sadeghpour — Mon, 30 Sep 2019 14:01:42 GMT

Thanks for your response.

after shorting SB47 jamper on PCA10056 DK, I Connected pins of my custom soc like below to P20 port of my PCA10056 DK:

CustomSOC -> PCA10056 DK

------------------------------------------------------------

SWDIO -> SWDIO

SWDCLK -> SWDCLK

VBAT(means VDDH pin) -> VDDnRF

VCC_nRF(means VDD pin) -> VDDnRF'

GND -> GND of PCA10056 board

as VDDnRF and VDDnRF' has same output voltage, I assume that above configuration means that I straped VDDH to VDD. and also in P20 port I could not find any GND pin, so I connected it to GND pin of PCA10056 board.

I think that above configuration is correct but after connecting PCA10056 to PC nrfGo application did not recognize my custom soc and give below error.

there is anything that I am doing wrong? and also power supply of custom soc is correct because I can see that after connection PCA10056 to usb, default app on custom soc work.

thnaks

RE: programming custom NRF52840 soc with PCA10056 DK

Andreas — Mon, 30 Sep 2019 11:11:20 GMT

Hi,

You should not damage anything, so programming devices in development should not be a problem. The REG0 regulator stage is not designed for being operated this way, and we have not verified the IC for use in this way, so we can not guarantee that it will stay shut of, and that it will not take damage. This means that for production programming at least you should not do this, but then you will probably use a programmer that supports 1.8 V anyway. If you only have one board you might want to strap VDDH to VDD while programming just to be sure.

Best regards,

Andreas