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Cannot find bluetooth-device in 51822QFAA

Before I use 51822QFAC(with 32K RAM), add I must use 51822QFAA(with 16K RAM)。 

I have modify IRAM area,like this

IRAM: 0x20001FE8  0x2018.

and selete device is 51822QFAA  in keil/porject/option/device.

now my code  can run ok in 51822QFAC, but cannot run ok in  51822QFAA;

In 51822QFAA I cannot connect it with my phone(It could be connect with the same code in 51822QFAC). Now  I sure ram area is in safe-area(0x20001FE8-0x20003FFF)。Code can debug,can shine leds, can check buttons. 

I donnot know the reason.

My softdeice is S130. Is softdevice not support  51822QFAA? Or do I make orther mistake? 

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