由于VREF=2.5V，对于8位的AD而言，只需小数点左移2位即可转化为具体值。

NET "clk" LOC = P55;#系统时钟
net "addata" loc = P30;#TLC549 AD模块
net "adncs" loc = P33;
net "adclk" loc = P32;
NET "yima[7]" LOC = P120;#数码管段选
NET "yima[6]" LOC = P115;
NET "yima[5]" LOC = P117;
NET "yima[4]" LOC = P121;
NET "yima[3]" LOC = P124;
NET "yima[2]" LOC = P118;
NET "yima[1]" LOC = P116;
NET "yima[0]" LOC = P119;
NET "CNT[7]" LOC = P12;#数码管位选
NET "CNT[6]" LOC = P11;
NET "CNT[5]" LOC = P10;
NET "CNT[4]" LOC = P9;
NET "CNT[3]" LOC = P101;
NET "CNT[2]" LOC = P102;
NET "CNT[1]" LOC = P99;
NET "CNT[0]" LOC = P100;