| ??? 07/26/05 09:16 Read: times Msg Score: +1 +1 Informative |
#98121 - Another aspect Responding to: ???'s previous message |
We have a good example from Prahlad:
As the sink current increases the Vol [ Low level logic pin voltage ] also increases and with LPC932 @ Sink 3.2mA Vol max = 0.3V and @ Sink 20 mA Vol max = 1V. It shows that the logic level of 0 gets much worse with increasing load. It doesn't really matter if the Port isn't used for anything else, but it's a serious problem if it is also connected to input of some other logic. In that case the "impure" 0, or 1, can cause troubles, so it should by all means be avoided (ie. extern drivers used). Regards, Slobodan |
| Topic | Author | Date |
| Driving LED | 01/01/70 00:00 | |
| Re: Led Driving | 01/01/70 00:00 | |
Another aspect | 01/01/70 00:00 | |
| Sawing with a file.. | 01/01/70 00:00 | |
| How many LEDS | 01/01/70 00:00 | |
| Driving LEDs | 01/01/70 00:00 | |
| PNP | 01/01/70 00:00 | |
| Good design practice | 01/01/70 00:00 | |
| generalizations | 01/01/70 00:00 | |
| Ground bounce is an issue | 01/01/70 00:00 |