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【单选题】
使用printf、putchar、puts函数输出数据，必须先对串行口初始化，初始化内容之一是写SCON设置串行口工作方式。设串行通信传输格式为8个数据位、1个停止位，1个校验位，则设置SCON的数值为下面的（）
A.
0xe0；
B.
0xc0；
C.
0xb0；
D.
0xa0。
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