simmilarly like that. Now we connect the PIN1(EN) to the GND. The CLK strob is got from (WR OR A15) (using 74LS32.
the control program is as following, the purpose of it is to write 55h to 74HC374
mov DPTR,#7fffH
mov A,#55h
movx @DPTR,A
We have a strange problem. the phenomenon Is that while we using the 4071 OR gate to get the CLK strob signal, the circuit didn't work and it works by replace it with a 74LS32. Most of the Latched data is right, but the data often with erro. I have no idea this is the program problem or the hardware problem.