| ??? 03/21/06 17:04 Read: times |
#112722 - No Responding to: ???'s previous message |
The ports are quasi-bidirectional.
Set the port pin to 1. It will read as a 1. If the thing connected to the port pin pulls it low it will read 0. This is true of standard 8052 port pins. Port 0 may need pull ups. High power pins available on some chip are different. |
| Topic | Author | Date |
| About I/O 89C52 | 01/01/70 00:00 | |
| what about reading this thread | 01/01/70 00:00 | |
| hmm ? | 01/01/70 00:00 | |
| So, read it. | 01/01/70 00:00 | |
| but | 01/01/70 00:00 | |
| yes | 01/01/70 00:00 | |
| reread the "bible" | 01/01/70 00:00 | |
| so | 01/01/70 00:00 | |
| bfore reading a 1 read the bible | 01/01/70 00:00 | |
| Ports | 01/01/70 00:00 | |
pullup + loading capacitance | 01/01/70 00:00 | |
| No | 01/01/70 00:00 | |
| so that's true ? | 01/01/70 00:00 | |
| no else if | 01/01/70 00:00 |