| ??? 09/25/12 03:36 Read: times |
#188440 - Dallas, Dptr, and DB Responding to: ???'s previous message |
The Dallas controller sounds like a good one to use. I have no idea about the serial bus select speed on the 89S52, I've used serial only for musical midi with a 12 mhz xtal.
The dptr select- that might have been my problem with my 89S52 movx instructions. I'll try that next time. And a note to Jim- thanks again! The movc A,@A+dptr instructions worked perfect as you suggested. I had a perfect 256 byte sinewave first try. The 89LP6440 apparantly defaults to Xram because a simple .db statement with a movc reads that sinewave just fine. I tried it at addresses F000, 8000, 1000, 2000, and 04. I never had to set memcon or auxr which normally enable Xram, Flash data, or Extra ram. Rick |
| Topic | Author | Date |
| .db instr does not work like before with movx A,@dptr | 01/01/70 00:00 | |
| Brain Fade ? | 01/01/70 00:00 | |
| memory access | 01/01/70 00:00 | |
| Did you ever try the Maxim/Dallas DS89C4x0? | 01/01/70 00:00 | |
| Handle the dptr with care... | 01/01/70 00:00 | |
| Dallas, Dptr, and DB | 01/01/70 00:00 | |
| not really | 01/01/70 00:00 | |
| Perhaps what he means is ... | 01/01/70 00:00 | |
| Make no mistake... | 01/01/70 00:00 | |
| and also the XMEGA | 01/01/70 00:00 | |
| XMEGA ADC | 01/01/70 00:00 | |
I agree... | 01/01/70 00:00 | |
| those samples that Andy and others were expecting | 01/01/70 00:00 | |
| Is it 2007 already?? | 01/01/70 00:00 | |
| That's why I refer to them as MAXIM/DALLAS | 01/01/70 00:00 | |
| Part Numbers ? | 01/01/70 00:00 | |
| None in particular ... | 01/01/70 00:00 |