Modulation is based on the UCBRSx setting as shown in Table 11–2. A 1 in the
table indicates that m = 1 and the corresponding BITCLK period is one BRCLK
period longer than a BITCLK period with m = 0. The modulation wraps around
after 8 bits but restarts with each new start bit.
Table 11–2. BITCLK Modulation Pattern
UCBRSx Bit0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7
0 0 0 0 0 0 0 0 0
1 0 1 0 0 0 0 0 0
2 0 1 0 0 0 1 0 0
3 0 1 0 1 0 1 0 0
4 0 1 0 1 0 1 0 1
5 0 1 1 1 0 1 0 1
6 0 1 1 1 0 1 1 1
7 0 1 1 1 1 1 1 1
如果是3的话就是bit2咯？有3个1 4的话是bit7？ 是这样理解的么？ 最后一位总是设置0是不是好设置点呀？因为这是datasheet里的呀。。