nRF52 pin connection with 6-pin J-Link

[Amigo]

Can the nRF52 be programmed by 6-pin J-Link Adapter by just connecting the following 4 pins,

Pin 1 : 3.3v Supply, Pin 2 SWDIO, Pin 4 SWDCLK, Pin 5 GND,

Can pins 3 & 6 of 6-pin J-Link Aapter be left unconnected or do we need to have some pull up/pull down on the pins?

The Adapter datasheet labels Pin 3 = nRESET and Pin 6=SWO but there is no additional information.

[RK]

Yes you only need to connect those 4 pins - if you look at the circuit diagram for the PCA10040, which is the dev board for the nRF52, you'll see what exactly is connected to which pins of the on-board ARM header - just follow that and you'll be fine.

[Amigo]

PCA10040 uses 10 pin Debug Connector (P18). There are 2 additional pins P0.18 & P0.21 besides the SWDIO & SWDCLK. Do you mean that P0.18 & P0.21 can be left unconnected?