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  • Case ID: 289965
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Can't flash external PCB with nRF52 DK (No idcode detected)

user115056

Hi,

I have external PCB, looks like this:



Need help with flashing the nRF52832 chip via nRF52 DK, please.

External PCB have identical pin assignments as QFN48 pin assignments (https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.nrf52832.ps.v1.1%2Fpin.html&cp=2_1_0_3&anchor=pin_assign)

Wired by this schema:

External PCB               nRF52 DK     
NAME PIN NAME PIN
VDD (3 Volts) 48 VDD VDD
VDD (3 Volts 48 VTG VTG
SWD IO 26 SWD IO SWD IO
SWD CLK 25 SWD CLK SWD CLK
GND (VSS) 45 GND DETECT (P20) GND DETECT (P20)
GND (VSS) 45 GND GND

(https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.nrf52832.ps.v1.1%2Fpin.html&cp=2_1_0_3&anchor=pin_assign)

I'm using SEGGER Embedded Studio but when I try Connect J-LINK I get error:



Failed to connect to target. No idcode detected. Please check connection and Target interface Type

Badly wired pins ? Or is problem in something different ?

nRF52 DK flashing (Build and Run) works perfectly fine.

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  • 0

    Hi Jonathan,

    thank you so much for answer ! I would try to design custom PCB with all the needed components for my project.

    Also I have a question what are the DEC pins for ?

    And shouldn't be there also a part for the DEC2 ? (I found it in the downloaded schematic)


    One more question, how can I continue our conversation and not have to start a new reply every time ? I couldn't find the reply button on your answer.

    Thanks !

Reply
  • 0

    Hi Jonathan,

    thank you so much for answer ! I would try to design custom PCB with all the needed components for my project.

    Also I have a question what are the DEC pins for ?

    And shouldn't be there also a part for the DEC2 ? (I found it in the downloaded schematic)


    One more question, how can I continue our conversation and not have to start a new reply every time ? I couldn't find the reply button on your answer.

    Thanks !

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  • 0 in reply to user115056
    JirkaMartinec said:
    Also I have a question what are the DEC pins for ?

    DEC pins are related to some internal thing on the chip that needs to be decupled.  So for example the internal power rail, it needs a capacitor to behave properly and be stable. 


    JirkaMartinec said:
    And shouldn't be there also a part for the DEC2 ? (I found it in the downloaded schematic)

    DEC2 is not needed. It can be populated, but it is not needed. 




    JirkaMartinec said:
    One more question, how can I continue our conversation and not have to start a new reply every time ? I couldn't find the reply button on your answer.

    A issue that sometimes occurs on the Devzone web page is that if you are using some addons in the browser, like AdBlock for example, it can sometimes effect what buttons showing. 

    So try to refresh the page a couple of times then the reply buttons should show up, if not try a different browser or incognito mode. 

    Regards,
    Jonathan

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