启动地址 长度
APP ROM地址 0x23000 0x5D000
2.RAM分布
By default, the nRF52 SoC will have a shared callstack with both application stack frames and SoftDevice stack
frames, managed by the main stack pointer (MSP).
There is no heap required by nRF52 SoftDevices. Theapplication is free to allocate and use a heap without
disrupting the SoftDevice functionality.