| ??? 07/18/05 12:55 Read: times |
#97558 - Migration on AT89C51ED2 problem |
Hi!
We have a board, who was designed for AT89C31 + external memory (EA always GND). Now we need to use AT89C51ED2. And we have next trouble: Without lock bit 2 program starting from external memory (and working fine). With lock bit 2 program not starting... What kind of problem we have? Guy who was written this programm is far away :-( I try to understand differens, but my knowledge is not enought... |
| 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 |