User Manual

nRF51 Development Kit User Guide v1.0
Page 14
5.4 Connector interface
Access to the nRF51422 GPIOs is available at connectors P2, P3, P4, P5, and P6 on the nRF51 DK board.
In addition there is access to ground and power on the P1 connector.
Figure 10 nRF51 DK board connectors
The signals are also available on bottom side connectors P7, P8, P9, P10, P11, and P12. By mounting pin
lists on the connector footprints, the nRF51 DK board can be used as a shield for Arduino motherboards or
other boards that follows the Arduino standard.
For easy access to GPIO, power, and ground, the signals can also be found on the through-hole connectors
P13-P17.
Note: Some pins have default settings.
• P0.08, P0.09, P0.10, and P0.11 are by default used by the UART connected to the
Interface MCU. See Section 4.2 “Virtual COM port” on page 9 for more information.
• P0.17 - P0.24 are by default connected to the buttons and LED.
See Section 5.5 “Buttons and LEDs” on page 16 for more information.
• P0.26 and P0.27 are by default used for the 32 kHz crystal and are not available on the
connectors. See Section 5.6 “32.768 kHz crystal” on page 17 for more information.