I Modify my code for 7 buttons from 7 gpios. But my code has a issue at sdk_config.h. The define of GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS is 9. When I built the code and download the code to my target board though Jlink V9. It is OK first time. But it always fail if I want to download code again. Does anyone knows why? How to solve it? Why my error program made the target board cannot re-download again.