| ??? 11/28/08 14:30 Read: times |
#160369 - Average Responding to: ???'s previous message |
What he mean is that if you are modulating the output pin, then a multimeter will measure an average that is affected by the quotient of high/low on the signal pin.
To measure the high and lov voltages for a signal pin that is constantly changing state, you need an oscilloscope. |
| Topic | Author | Date |
| ouput voltage when pin is pulled low | 01/01/70 00:00 | |
| Check the datasheet | 01/01/70 00:00 | |
| Different VOLs? | 01/01/70 00:00 | |
| Why not? | 01/01/70 00:00 | |
| Always variances | 01/01/70 00:00 | |
| Shouldn't be that different! | 01/01/70 00:00 | |
| the thing in the datasheet everybody misses | 01/01/70 00:00 | |
| Within limits but.. | 01/01/70 00:00 | |
| AT 25 mA!!! | 01/01/70 00:00 | |
| Average | 01/01/70 00:00 | |
| Not modulating the pin! | 01/01/70 00:00 | |
| ...any low is a fine low! | 01/01/70 00:00 | |
| 'some' may not be a problem .... | 01/01/70 00:00 | |
| Of course, but... | 01/01/70 00:00 | |
| No, it is not fine! | 01/01/70 00:00 | |
no, it is not | 01/01/70 00:00 |