| ??? 03/24/07 23:33 Read: times |
#135822 - An interesting article... Responding to: ???'s previous message |
Although I don't use this particular flavor of the 8051, I do use the uPSD and ST published an interesting article on crystal design that was helpful to me.
It turns out to get the third overtone from a crystal, some inductance is necessary. This may be what's happening when you touch the crystal, or use a scope probe... Try reading this PDF file, and see if it helps you out: http://www.st.com/stonline/.../10105.htm Best of luck, -db |
| 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 |