| ??? 02/28/08 16:07 Modified: 02/28/08 16:14 Read: times |
#151605 - Exactly, but not only... Responding to: ???'s previous message |
The phase condition is one aspect, the other is the drive level!! Without this high resistance the crystal would have a barbecue as for these quartzes the maximum drive level is only 1µW (microWatt)! Standard HC49U crystals resist up to 1mW, which is thousand times more...
A while ago I have tried to explain this subject here: http://www.8052.com/forum/read.phtml?id=79811 Kai |
| Topic | Author | Date |
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| Why the 330K resistor is needed | 01/01/70 00:00 | |
| Exactly, but not only... | 01/01/70 00:00 | |
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| What micro? | 01/01/70 00:00 | |
Capacitor for 32.768 crystal | 01/01/70 00:00 |