Hi,
I am trying to connect my J-Link to a RedBearLab BLE Nano via SWD.
I connected VTref, GND, SWDIO and SWCLK to the corresponding pins on the board, but, even though the board was powered and had 3.3V on VDD (which was connected to VTref), J-Link commander showed VTref = 0.000 V.
I then tried powering the board via J-Link (pin 19 linked to Vin), and in this way VTref was around 5 V, which should be impossible since the board can only have 3.3 V on Vdd.
In both cases I got "Can not connect to target" when trying to connect to the board.
Can you please help me figure out why it doesn't work?
Thank you.
[img]https://static1.squarespace.com/static/5039e08be4b00cf0e8cf88cd/t/541d40b1e4b06fd9d8333e0f/1411203249422/?format=500w[/img]
I am trying to connect my J-Link to a RedBearLab BLE Nano via SWD.
I connected VTref, GND, SWDIO and SWCLK to the corresponding pins on the board, but, even though the board was powered and had 3.3V on VDD (which was connected to VTref), J-Link commander showed VTref = 0.000 V.
I then tried powering the board via J-Link (pin 19 linked to Vin), and in this way VTref was around 5 V, which should be impossible since the board can only have 3.3 V on Vdd.
In both cases I got "Can not connect to target" when trying to connect to the board.
Can you please help me figure out why it doesn't work?
Thank you.
[img]https://static1.squarespace.com/static/5039e08be4b00cf0e8cf88cd/t/541d40b1e4b06fd9d8333e0f/1411203249422/?format=500w[/img]