| ??? 02/03/09 11:36 Read: times |
#161988 - minimum pule is 1086 nanoseconds. Responding to: ???'s previous message |
The answer to your first question is infinity (and beyond) since I think that those particular chips are completely static. Without a subsequent P1_0 = 0, the pin will remain high.
It is unlikely that you can get a 40ns pulse from any regular microcontroller. You could always just use the 8051 to start a dedicated hardware one-shot chip. I presume that your teacher has just given you a trick question. google for "nanosecond" David. |
| Topic | Author | Date |
| what is the signal freuency on all ports of at89c52/51 | 01/01/70 00:00 | |
| minimum pule is 1086 nanoseconds. | 01/01/70 00:00 | |
| Buzz! | 01/01/70 00:00 | |
| 40ns is a very short time | 01/01/70 00:00 | |
| You need a faster MCU | 01/01/70 00:00 | |
| the fastest '51 | 01/01/70 00:00 | |
| 80ns ? | 01/01/70 00:00 | |
| Sorry about that ... | 01/01/70 00:00 | |
| Still not known if single pulse or pulse train | 01/01/70 00:00 | |
| Where there's a will ... | 01/01/70 00:00 | |
| Timer or PCA | 01/01/70 00:00 | |
| repeat earlier question with clarity | 01/01/70 00:00 | |
| Timing can't be discussed when C is involved | 01/01/70 00:00 | |
| Think about it | 01/01/70 00:00 | |
| Supplementary question... | 01/01/70 00:00 | |
At first blush . . . | 01/01/70 00:00 |