用IAP15W4K61S4单片机的6路增强型PWM波形发生器产生PWM信号,要访问扩展SFR,则端口配置寄存器 P_SW2的最高位EAXSFR应当设置为<br/> A、0x80<br/> B、0x01<br/> C、1<br/> D、0
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