| ??? 03/03/05 14:56 Read: times |
#88986 - oh, I did just that Responding to: ???'s previous message |
However, if you write a '0' to a pin, it turns the open-drain driver ON and there is no way that anything external can ever force it to anything other than '0'
Once by accident, I managed to do what you say can't be done I once accidentially connected a port with a '0' written to it to Vcc directly. This, of course, destroyed the open drain driver. After that I could read what was input to the port regardless of what was written to it. Pure luck that it did not totally destroy the chip. Erik |
| Topic | Author | Date |
| on 8051 settings pins as input or output | 01/01/70 00:00 | |
| re: setting pins as input or output | 01/01/70 00:00 | |
| thanks | 01/01/70 00:00 | |
| Do you not | 01/01/70 00:00 | |
| It's depending on chip | 01/01/70 00:00 | |
| depending on chip | 01/01/70 00:00 | |
| No reason for negative Karma point | 01/01/70 00:00 | |
| fine | 01/01/70 00:00 | |
| not first post, not first time asked | 01/01/70 00:00 | |
| Picky, picky, but no such thing! | 01/01/70 00:00 | |
| oh, I did just that | 01/01/70 00:00 | |
| Don't try this at home... | 01/01/70 00:00 | |
| Maybe it still works... | 01/01/70 00:00 | |
| Eh??? | 01/01/70 00:00 | |
| It's a joke, don't take it too literaly | 01/01/70 00:00 | |
| Sorry | 01/01/70 00:00 | |
My english is still so poor... | 01/01/70 00:00 |