| ??? 12/03/04 18:39 Read: times |
#82485 - I/O read Responding to: ???'s previous message |
All the 8051 port pins are open drain and either have built in pullups or use external pullups. This means that as long as the output has a 1 written to it you can use it as an input.
Ian |
| Topic | Author | Date |
| I/O read doubt.. | 01/01/70 00:00 | |
| I/O read | 01/01/70 00:00 | |
| got the idea. | 01/01/70 00:00 | |
port pin can sink and source | 01/01/70 00:00 | |
| look at the sachmatic in "the bible" | 01/01/70 00:00 |