| ??? 11/25/09 04:44 Read: times |
#171143 - Difference only noticeable if contention Responding to: ???'s previous message |
Having the reads follow the writes is true for a push-pull output. But it is also true for a classic port in quasi-bidirectional mode if no external hardware pulls the signal low.
It is only when exernal hardware is trying to contend with the 8051 that it will matter if the 8051 has push-pull drive or not. |
| Topic | Author | Date |
| Receiving output from ADC0848. | 01/01/70 00:00 | |
| Don't feed other pins without VCC | 01/01/70 00:00 | |
| CS and RD working. | 01/01/70 00:00 | |
| Wrong understanding of ADC! | 01/01/70 00:00 | |
| But according to Mazidi... | 01/01/70 00:00 | |
| No, you don't! | 01/01/70 00:00 | |
| Sorry! | 01/01/70 00:00 | |
| How do you see that? | 01/01/70 00:00 | |
| The LCD shows a 255. | 01/01/70 00:00 | |
| But this can have zillions of reasons... | 01/01/70 00:00 | |
| Never retype source code when posting | 01/01/70 00:00 | |
| Working! But with errors... | 01/01/70 00:00 | |
| You must convert raw ADC reading into temperature | 01/01/70 00:00 | |
Self-heating? | 01/01/70 00:00 | |
| Configured as push-pull? | 01/01/70 00:00 | |
| It's a P89v51RD2 | 01/01/70 00:00 | |
| Difference only noticeable if contention | 01/01/70 00:00 | |
| then STOP what you are doing | 01/01/70 00:00 |