51822ab CAN'T RUN

[mnxnm]

I use softdevice 6.00, size is 80K Byte. I use the chip NRF51822ab,and configurat the irom start at 0x14000,size 0xC000, IRAM, start at 0x20002000,size is 0x2000 ,in keil. both the softdevice S110 and app ble_app_hrs are downloaded the chip successfully, but it doesn't work . Phone can't find the device ,and I checked the board ,find the chip didnit run ,the 16M crystal didn't work. why? How can I configurate the FLASH?

[mnxnm]

Hi stefan, the problem is closed,the chip can't run not for the iRAM but for the clock,need change the LFCLK RC oscillator as the low clock source.