nRF51 SDK - S120 SoftDevice
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Pin Change Interrupt Example

The Pin Change Interrupt Example demonstrates interrupts on PIN_IN change. PIN_OUT is configured as output and toggled in the PIN_IN change interrupt handler.

The application starts with configuring the pins and configuring GPIOTE to give an interrupt on PIN_IN change. The interrupt handler toggles PIN_OUT (LED 1) when PIN_IN (button 1) is pressed or released.


The name of the example is pin_change_int_pca10028. If you are not using the Keil Pack Installer, you can find the source code and project file of the example in the following folder: <InstallFolder>\examples\peripheral\pin_change_int

LED assignments:

  • LED 1 is toggled by interrupt.

Button assignments:

  • Button 1 triggers interrupt that toggles LED 1.


Test the Pin Change Interrupt Example application by performing the following steps:

  1. Compile and program the application.
  2. Press button 1 and check if LED 1 toggles.