| ??? 06/13/07 14:56 Read: times |
#140672 - OK, then don't switch on the /2 flag! Responding to: ???'s previous message |
You have switched on the /2 (6-clk) flag when programming the 'V51RD2 (in FM v3.something, "Prog Clocks Bit" tickbox). The timing of the external bus shrinked exactly to half. That's why your external memory mapped IO stopped working.
You can either use a crystal/oscillator with exactly half the frequency of the original, or don't switch that flag on. JW PS. Erik: OK so it IS timing-related, but the timing is unrelated to internal/external execution. |
| Topic | Author | Date |
| 89V51 Code running from FLASH vs EPROM | 01/01/70 00:00 | |
| faulty code | 01/01/70 00:00 | |
| timing? | 01/01/70 00:00 | |
| I need some shematics and programe code using asm | 01/01/70 00:00 | |
| 89V51 Code running from FLASH vs EPROM | 01/01/70 00:00 | |
| hummm.... | 01/01/70 00:00 | |
| OK, We're on to something.... | 01/01/70 00:00 | |
| questions | 01/01/70 00:00 | |
| OK, then don't switch on the /2 flag! | 01/01/70 00:00 | |
| /2 Flag | 01/01/70 00:00 | |
| and the code security flag? | 01/01/70 00:00 | |
| PLM51 Question. | 01/01/70 00:00 | |
| TWO WRONGS | 01/01/70 00:00 | |
| I am still not convinced... | 01/01/70 00:00 | |
| Still a Problem, but........ | 01/01/70 00:00 | |
| P89v51 does have some differences | 01/01/70 00:00 | |
had to wait 5 minutes on someone | 01/01/70 00:00 |