Actually I have to receive the 3-bytes thorough serial link and then these three bytes are then converted into paralell. I use 74245 buffer and then use three 74LS373 latches....But the problem is that there is only first byte present at all the latches.Then I debug this by connecting two latches instead of three to check the 74LS373 working,The code is as below
org 0h LE1 bit P1.1 LE2 bit P1.2
mov P1,#00h ;clear Port1 main: mov P2,#0AAh ;place dats on port2 which is data port for byte. setb LE1 acall delay clr LE1
acall delay ; wait for sometime before placing the next data
mov P2,#55h setb LE2 acall delay clr LE2
sjmp main
delay: mov r2,#250 here : djnz r2,here ret end
When I dump the following code then is appear to be toggling on both latches...... I have tried many times but cant get the exact reason for this Before that I have successfully interface the 74LS373 for data/address demultiplexing in 8051