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.

Can't flash external PCB with nRF52 DK (No idcode detected)

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 user115056 over 4 years ago

Thanks for your answer, I'm very sorry, but I'm a would-be beginner at this.

Which pins must be connected to which pins ?

Thank you so much again for your help to even look at this ticket.
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0 user115056 over 4 years ago

Thanks for your answer, I'm very sorry, but I'm a would-be beginner at this.

Which pins must be connected to which pins ?

Thank you so much again for your help to even look at this ticket.
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0 user65515 over 4 years ago in reply to user115056

Ah, not easy. Start by simply connecting pins 13 and 36 to VDD (48); andpin 31 to VSS GND (45). There will be no external crystal or decoupling, but it might work sufficiently to program the board. To work properly, however, all the non-optional components shown must be also fitted.
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