| ??? 06/14/01 11:48 Read: times |
#12502 - RE: using 74HC374 to 51 series bus |
Thank you very much for your kind help. We're using 4 pieces of 74HC374 in this circrit.The PIN4,6,9 amd PIN12 of 74LS32 are connected to /WR, PIN2,5,10 and 13 are connected to A15,A14,A13 amd A12 respectively. PIN3,6,8 and PIN11 are connected to the CLK of the 4 pieces of 74HC374 respectively.
The addresses of program are as following, !) 7fffh 2) bfffh 3) dfffh 4) efffh Except of these ,there're no any other accessing external memory instructions in the entire program. |
| Topic | Author | Date |
| using 74HC374 to 51 series bus | 01/01/70 00:00 | |
| RE: using 74HC374 to 51 series bus | 01/01/70 00:00 | |
| RE: using 74HC374 to 51 series bus | 01/01/70 00:00 | |
| RE: using 74HC374 to 51 series bus | 01/01/70 00:00 | |
| RE: using 74HC374 to 51 series bus | 01/01/70 00:00 | |
| RE: using 74HC374 to 51 series bus | 01/01/70 00:00 | |
| RE: using 74HC374 to 51 series bus | 01/01/70 00:00 | |
| RE: using 74HC374 to 51 series bus | 01/01/70 00:00 | |
RE: using 74HC374 to 51 series bus | 01/01/70 00:00 |