| ??? 08/26/09 04:55 Read: times |
#168548 - Need more information Responding to: ???'s previous message |
Hi Chico,
Assuming you're using an 8052 derivative, you shouldn't need pull up resistors on P1. You'll only need those on P0. Also assuming that you haven't shorted any of your traces to each other, there are a number of things that could be wrong. Are you current limiting your supply when you engage the switches? And do you have a good reset supervisor or are you using that RC circuit for power on reset? I would suggest that you post your code. Be sure to read up on how to do so, and specifically how to preserve the formatting, first. Joe P.S. Does "hola" mean hello in Portugese? I don't really think it does, but asking seemed an easy segway into this question. If not, what is Portugese for "hello?" |
| Topic | Author | Date |
| dip-switch matrix trouble | 01/01/70 00:00 | |
| Need more information | 01/01/70 00:00 | |
| It's olá ... | 01/01/70 00:00 | |
| ghosting? | 01/01/70 00:00 | |
| Looks like ghosting | 01/01/70 00:00 | |
| Do you have two spare pins? | 01/01/70 00:00 | |
| Please tell us how you've wired your matrix | 01/01/70 00:00 | |
| My working matrix schematic* | 01/01/70 00:00 | |
| It looks OK, but... | 01/01/70 00:00 | |
| maybe, maybe not | 01/01/70 00:00 | |
| thats true | 01/01/70 00:00 | |
| External resistors for speed or reading slower | 01/01/70 00:00 | |
| noise, yes - but | 01/01/70 00:00 | |
| Different use of resistors | 01/01/70 00:00 | |
| I could be mean | 01/01/70 00:00 | |
| Was actually on topic ;) | 01/01/70 00:00 | |
| being off-topic or not... | 01/01/70 00:00 | |
| You need to show us the schematic and more | 01/01/70 00:00 | |
| he did | 01/01/70 00:00 | |
| Not quite enough | 01/01/70 00:00 | |
| not much code to show | 01/01/70 00:00 | |
=) Thanks for the +1 Informative =) | 01/01/70 00:00 |