Hardware description
Figure 17: 32.768 kHz crystal and SB1–SB4
4.7 Debug input
The Debug in connector (P18) makes it possible to connect external debuggers for debugging while
running on battery or external power supply.
Figure 18: Debug input
4.8 Debug output
The nRF52 DK supports programming and debugging external boards with nRF51 Series or nRF52 Series
SoCs. To debug an external board with SEGGER J-Link OB IF, connect to the Debug out connector (P19)
using a 10-pin cable.
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