nRF51821 custom board

[mukesh]

I want to make a custom board using nRF51822. Currently I am using nRF go studio starter kit and pca10005 board. I am using segger jtag programmer for loading code to the ic. The connection to the board and programmer is done by a 10 line cable. If I would make a custom board , how can I use this same programmer for that board. What are the necessary lines needed for that purpose.

[Stian Røed Hafskjold]

You need a debugger that supports the SWD (Serial Wire Debug) interface. Since you are already debugging the chip with your J-Link, it supports it.

Then, you just need to connect the SWDIO and the SWCLK pins from the chip to the debugger, and also the VTref (supply voltage reference). If you have a JTAG programmer with SWD support, the SWDIO and SWCLK are overlaid on the TMS and TCK pins.

Look at the SWD interface description here, www.segger.com/interface-description.html, the SWO is not used and RESET is not needed.