| ??? 02/21/08 13:55 Read: times |
#151243 - 3rd overtone crystal? Responding to: ???'s previous message |
Thanks. I have already heard something about it, but I do not know how to recognize an overtone crystal.
I have just bought an 11.0592 crystal and there is nothing written on it except its frequency. What I can assure is that the pin 30 (ALE/PROG\) is giving me a frequency of 1.87MHz, which is 1/6 of the crystal freq. Is that a confirmation that the crystal is working in the correct freq? Carlos |
| Topic | Author | Date |
| Slow program execution | 01/01/70 00:00 | |
| try something simple | 01/01/70 00:00 | |
| is it running at exactly 1/3 the devboard speed? | 01/01/70 00:00 | |
| 3rd overtone xtal not likely at 11.0592MHz... | 01/01/70 00:00 | |
| 3rd overtone crystal? | 01/01/70 00:00 | |
| yes, this means no overtone | 01/01/70 00:00 | |
| good catch | 01/01/70 00:00 | |
| I tried the blinking led... | 01/01/70 00:00 | |
| Slow? | 01/01/70 00:00 | |
| I've seen that | 01/01/70 00:00 | |
| this is not the case | 01/01/70 00:00 | |
| You're right | 01/01/70 00:00 | |
| sounds like intermittent clock | 01/01/70 00:00 | |
| Slow operation, normal UART | 01/01/70 00:00 | |
| I found the problem | 01/01/70 00:00 | |
| for what purpose? | 01/01/70 00:00 | |
| IIRC, it's vanilla in this respect... | 01/01/70 00:00 | |
| interrupt | 01/01/70 00:00 | |
| I can see an 'exotic' case or two | 01/01/70 00:00 | |
this is one of the reasons | 01/01/70 00:00 | |
| Please post your schematic? | 01/01/70 00:00 | |
| And photos? | 01/01/70 00:00 |