| ??? 07/19/05 06:33 Read: times |
#97605 - More detail Responding to: ???'s previous message |
The main thing it is exclude external memory from device.
We programming AT89C51ED2 with program, who was in external memory early. But for execution from internal memory we need set lock bit 2, because !EA signal on the board always GND and without lock bit 2 program will be start from external memory. And that trouble - programm that working fine from external memory don't working from internal memory :-( We set: BLJB to start the user's application from 0000h X2 bit to standart mode XRAM config bit to valid XRAM |
| Topic | Author | Date |
| Migration on AT89C51ED2 problem | 01/01/70 00:00 | |
| please | 01/01/70 00:00 | |
| more details, please | 01/01/70 00:00 | |
| More detail | 01/01/70 00:00 | |
| possible reasons | 01/01/70 00:00 | |
| LB2 and /EA | 01/01/70 00:00 | |
| acording datasheet | 01/01/70 00:00 | |
| Also according to the datasheet: | 01/01/70 00:00 | |
| what Atmel says | 01/01/70 00:00 | |
| ... and what does not say. | 01/01/70 00:00 | |
| pull the blasted !EA and come back to re | 01/01/70 00:00 | |
| That Atmel chip difference !!! | 01/01/70 00:00 | |
different manufacturer | 01/01/70 00:00 |