查阅18B20手册，LSB的最低四位代表小数，MSB的最高5位为符号位，其余的7位为整数部分，其分辨率为0.0625°，根据此规律，整数就是两字节凑在一起，而小数部分则是最低四位的值，乘以0.0625，看你取几位小数，再取整即可。上述的对照表是取1位小数的结果，取四舍五入。比如现在LSB的最低四位是0111，那么小数部分就是0.0625*7=0.4375-Search 18B20 manual, LSB representative of a minimum of four decimal places, MSB is sign the top five bits, the remaining 7 bits are integer part, with a resolution of 0.0625 °, according to this law, the two-byte integer that get together, and fraction is the lowest four values, multiplied by 0.0625, to see you take a few decimal places, and then take the whole can. The above table is to take a fraction of the results, take rounding. Such as the minimum four LSB is now 0111, so the fractional part is 0.0625* 7 = 0.4375