| ??? 12/06/01 16:34 Read: times |
#17325 - External and Internal Addressing |
I am using the Temic 89C52RD2 and I need to start up in internal flash. But I want to be able to jump to external code later.
A Temic rep told me that if I set !EA low in software (by pulling it low with another line P1.4 in this case) I would be able to accomplish this. The EE who designed the board pulled !EA high through a resistor and then tied P1.4 to !EA. I have set P1.4 low in code but I don't get any PSEN's. Ideas?? |
| Topic | Author | Date |
| External and Internal Addressing | 01/01/70 00:00 | |
| RE: External and Internal Addressing | 01/01/70 00:00 | |
| RE: External and Internal Addressing | 01/01/70 00:00 | |
| RE: External and Internal Addressing | 01/01/70 00:00 | |
| RE: External and Internal Addressing | 01/01/70 00:00 | |
| RE: External and Internal Addressing | 01/01/70 00:00 | |
| RE: External and Internal Addressing | 01/01/70 00:00 | |
| RE: External and Internal Addressing | 01/01/70 00:00 | |
| RE: External and Internal Addressing | 01/01/70 00:00 | |
| RE: YES YOU CAN IF NO LOCK BITS ARE SET | 01/01/70 00:00 | |
| RE: External and Internal Addressing Sol | 01/01/70 00:00 | |
| RE: External and Internal Addressing | 01/01/70 00:00 | |
| RE: External and Internal Addressing | 01/01/70 00:00 | |
| RE: External and Internal Addressing | 01/01/70 00:00 | |
| RE: External and Internal Addressing | 01/01/70 00:00 | |
RE: External and Internal Addressing | 01/01/70 00:00 |