| ??? 02/24/07 02:57 Modified: 02/24/07 02:58 Read: times |
#133609 - Ok, different try... Responding to: ???'s previous message |
Sometimes, when experimenting and accidentally writing 0s to P3.0, while the ADC is emitting 1s, the port circuitry can be damaged, showing all the time 0s from then on, for the rest of micro's life. So, when disconnecting the ADC from P3.0 while having written 1s to P3.0, you should read logic high state by the help of multimeter. But if you measure 0V, on the other hand, then your micro is damaged and must be exchanged by a fresh one!
Kai |
| Topic | Author | Date |
| a peculiar problem | 01/01/70 00:00 | |
| ? | 01/01/70 00:00 | |
| To what port pin do you connect the MSB? | 01/01/70 00:00 | |
| and a schematic | 01/01/70 00:00 | |
| 1s written to P3.0? | 01/01/70 00:00 | |
| Modify your user profile | 01/01/70 00:00 | |
| yes | 01/01/70 00:00 | |
| What shows the voltmeter,... | 01/01/70 00:00 | |
| multimeter | 01/01/70 00:00 | |
| So you have 0V all the time at P3.0,... | 01/01/70 00:00 | |
| wen i connect p3.0.. | 01/01/70 00:00 | |
| Yes, but what if the ADC isn't connected? | 01/01/70 00:00 | |
| no no .. | 01/01/70 00:00 | |
| Ok, different try... | 01/01/70 00:00 | |
| precisely.. | 01/01/70 00:00 | |
| Does it also work, ... | 01/01/70 00:00 | |
| i didnt try it.. | 01/01/70 00:00 | |
| Just to see, whether there's an internal damage | 01/01/70 00:00 | |
i never thought of that .. | 01/01/70 00:00 | |
| modified | 01/01/70 00:00 | |
| Thanks, please publish your schematic again... | 01/01/70 00:00 | |
| sure | 01/01/70 00:00 | |
| Thanks! | 01/01/70 00:00 |