nrf51822 Minew's Module is not recognized by NRF51DK

[fercholas]

Hi guys

I am trying to program a nrf51822 module but it is not recognized by the development kit.

These are the pins that I am using:

I can not see the module with NRFGo on Windows or on linux with Jlink console.

Any idea?

Thanks in advance!

[bx]

Hi,

previous answers are correct that you need to short VCC to VTG.

Additionally you need a proper GND connection to your circuit, as GND_DETECT (pin 8 on P20) is an "input" that triggers use of external module (might be an oversimplification). I suggest you short one GND from connector P1 to your module, and short another GND to GND_DETECT.

Best regards,

Borut

[fercholas]

Hi Borut Thanks for answering. I have tried with the connection of P20 pins 2 and 3 without results.

• P20 pin 4 for SWDIO
• P20 pin 5 for SWDCLK
• P20 pin 8 for a connection between Modules's ground and NRF51DK's ground.
• P20 2 and 3 shorted.

This is the Segger Jlink output on Ubuntu:

nicolas@nicolas:~$ sudo JLinkExe -device nRF51822 -speed auto -if swd
SEGGER J-Link Commander V5.12e (Compiled Apr 29 2016 15:06:32)
DLL version V5.12e, compiled Apr 29 2016 15:06:27

Connecting to J-Link via USB...O.K.
 Firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Mar 15 2016 18:03:17
 Hardware version: V1.00
 S/N: 681325908
 VTref = 3.300V


  Type "connect" to establish a target connection, '?' for help
  J-Link> connect
  Device "NRF51822_XXAA" selected.
  TotalIRLen = ?, IRPrint = 0x..000000000000000000000000


   Found SWD-DP with ID 0x0BB11477
   Found Cortex-M0 r0p0, Little endian.
   FPUnit: 4 code (BP) slots and 0 literal slots
   CoreSight components:
   ROMTbl 0 @ F0000000
   ROMTbl 0 [0]: F00FF000, CID: B105100D, PID: 000BB471 ROM Table
   ROMTbl 1 @ E00FF000
   ROMTbl 1 [0]: FFF0F000, CID: B105E00D, PID: 000BB008 SCS
   ROMTbl 1 [1]: FFF02000, CID: B105E00D, PID: 000BB00A DWT
   ROMTbl 1 [2]: FFF03000, CID: B105E00D, PID: 000BB00B FPB
   ROMTbl 0 [1]: 00002000, CID: B105900D, PID: 000BB9A3 ???
   Cortex-M0 identified.

This device corresponds to nrf51DK's chip. I can't see module's chip. Thanks in advance!

[Vijay]

Hi fercholas, did you get this issue fixed? I am using a nRF52 PDK to program my nRF52810 IC - and I have the same issue as yours. 

Thanks,

-vivenkat