| ??? 08/10/05 09:57 Read: times |
#99099 - Silent at many places Responding to: ???'s previous message |
Prahlad said:
Datasheet and User Manual is silent. It's silent at many places! That's a big mess with the LPC9xx! Do I need this 5k1 pull up if this Comparator output pin is 8051 like quasi bidirectional? No. When emitting "logical high" weak internal active pull-up is strong enough to pull the output high, even with the feedback resistor connected to it. That's not difficult, because feedback resistor is >1M and the according current to flow is very small. Kai |
| Topic | Author | Date |
| LPC9xx Comparators and Hysterisis | 01/01/70 00:00 | |
| Feedback resistor is not enough | 01/01/70 00:00 | |
| Is this allright | 01/01/70 00:00 | |
| Tested it. | 01/01/70 00:00 | |
| calculations | 01/01/70 00:00 | |
| Re: Calculations. | 01/01/70 00:00 | |
| step down rartio | 01/01/70 00:00 | |
| Values need a change | 01/01/70 00:00 | |
| Please show the analyses | 01/01/70 00:00 | |
| Re: Value Changes. | 01/01/70 00:00 | |
| my doubt is | 01/01/70 00:00 | |
| Answers | 01/01/70 00:00 | |
| 1N914 not Zener. | 01/01/70 00:00 | |
| Silent at many places | 01/01/70 00:00 | |
| Low pass filter | 01/01/70 00:00 | |
| Answer | 01/01/70 00:00 | |
| Zero crossing detection | 01/01/70 00:00 | |
Thanks | 01/01/70 00:00 |