| ??? 03/24/07 10:44 Read: times |
#135762 - The tale of a 1000 fingers Responding to: ???'s previous message |
Hi Mike,
Yes, I understand. However, this is the value recommended by Atmel in their migration from '8252 to '8253. I failed to mention that I have manufactured about 5000 of these units before without any real problems. I have now also tried a 22pF, 44pF and smaller 2.2pF ( as well as no caps ) with exactly the same results. If I hold my finger on the contacts when no caps are present, the board works fine. This is not really a solution as I would need 1000 fingers. Any ideas. Thanks |
| Topic | Author | Date |
| AT89S8253 clocking problem | 01/01/70 00:00 | |
| The scope probe is the clue!! | 01/01/70 00:00 | |
| The tale of a 1000 fingers | 01/01/70 00:00 | |
| Alex did what the datasheet demands | 01/01/70 00:00 | |
| 1M across cap | 01/01/70 00:00 | |
| are you sure it is not 1/3? | 01/01/70 00:00 | |
| I had the same problem | 01/01/70 00:00 | |
| Works!! But is it a solution | 01/01/70 00:00 | |
| is it 1/4 or 1/3 | 01/01/70 00:00 | |
| Speed unstable | 01/01/70 00:00 | |
| May be clock amplitude... | 01/01/70 00:00 | |
| Crystal frequency | 01/01/70 00:00 | |
| An interesting article... | 01/01/70 00:00 | |
| Use an external oscillator! | 01/01/70 00:00 | |
wait a year or more for the errata | 01/01/70 00:00 |