For getting the simmilar function of 377, we connect the PIN1(EN) to the GND. The CLK strob is got from (WR OR A15) (using 74LS32. 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. 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.
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