In many portable instruments, the noise and EMI of its switch power supply must be solved, the preferable method is that EMI power is reduced with spread spectrum frequency technique.
They have no interest in providing you with a portable register map, so that you can switch the the competitor's compiler for the same MCU.
他们在为您提供一个便携式寄存器映射，这样就可以切换竞争对手的编译器相同的MCU没有兴趣。
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Operational amplifier is the most versatile signal conditioning block in any portable system. It can be a filter, an amplifier, an voltage detector, a level shifter, a buffer or even a switch.