When I try to firmware Recovery for my RAK11720 Lora Module I got this Error
SEGGER VTref → Lora 3V3
SEGGER GND → Lora GND
SEGGER SWDIO → Lora SWDIO
SEGGER SWDCLK → Lora SWDCLK
TTL 3.3V → Lora 3V3
TTL GND → Lora GND
This is my Connection
Does your J-link adapter support the Ambiq MCU’s?
I see you are using a J-Link EDU Mini V1.
Some J-Link adapter (special the ones for education) are limited to specific MCU’s. Please check with Segger if your adapter supports the Ambiq MCU’s.
On Segger adapter comparison it says that the Mini does not support J-Flash application.
Other than that:
Is this a RAK11720 on a custom PCB or is it our Breakout Board or our WisBlock RAK11722 Core module?
Did you double check that all connections are good?
Try to connect the RESET signal in addition to the J-link.
I don’t have any problems to use J-Link with a full (not educational) J-Link programmer:
