| ??? 12/16/02 06:49 Read: times |
#34506 - I had a similar project (continued) |
I can send you the schematic i have for having all I/O devices connected to port 0.
You will need a latch, and also a transceiver for the LEDs to enable/disable them. And you will also need a NAND gate. Actually, when i come to think about it, you dont really need a latch (you only have one input device and one output device). So you can just have a transceiver for the LEDs and a decoder (tristate, otherwise, you'll need another transceiver), for the keypad. Good luck |
| Topic | Author | Date |
| help: inteface 8051 to keyboard | 01/01/70 00:00 | |
| RE: help: inteface 8051 to keyboard | 01/01/70 00:00 | |
| RE: help: inteface 8051 to keyboard | 01/01/70 00:00 | |
| I had a similar project | 01/01/70 00:00 | |
| I had a similar project (continued) | 01/01/70 00:00 | |
RE: I had a similar project (continued) | 01/01/70 00:00 | |
| RE: I had a similar project (continued) | 01/01/70 00:00 | |
| RE: I had a similar project (continued) | 01/01/70 00:00 | |
| RE: I had a similar project | 01/01/70 00:00 |