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关于USCI UART波特率的问题

Other Parts Discussed in Thread: MSP430FR5739

MSP430FR5739

9600波特率

用4MHZ晶振作为ACLK,怎么设置波特率...我用波特率计算器算的UBR1=0X01;UBR0=0XA0;UCA0MCTLW=0XC000;

但是书上说小数部分,4000000/9600=416.66666

那么0.666*8=5

那5的话,MCTLW应该是0x6b才是啊...为什么是0XC0;