hi, i tried executing the below program but i am not getting the output in serial window when SCON=0x50; for mode0 and mode2 of SCON it is working but not for mode1 and mode3. #include<reg51.h> void main() { SCON=0X50; TCON=0X20; TH1=0Xfa; TL1=0X00; TR1=1; do{ TI=0; SBUF='H'; while(TI==0); }while(1); }