| ??? 06/06/06 15:31 Read: times |
#117877 - Purpose Responding to: ???'s previous message |
Erik said:
what purpose? My purpose is to use Port2 as output port only. I use Port3 for input-only by writing #FFh to it in the beginning of my program. After that, I will only read from that port. But Port2, which I want use only for output only, wont it suddenly become for-input-only if I happen to write a HIGH to any of its pins, (which I will)? In other words, can I continue to write-to port3 in spite of writing HIGH to some of its pins (which makes those pins as input pins)? |
| Topic | Author | Date |
| Help Understanding AT89C51 Datasheet | 01/01/70 00:00 | |
| logic gain and other | 01/01/70 00:00 | |
| Should I study more? | 01/01/70 00:00 | |
| do you have any hardware knowledge | 01/01/70 00:00 | |
| No hardware knowledge | 01/01/70 00:00 | |
| what purpose? | 01/01/70 00:00 | |
| Purpose | 01/01/70 00:00 | |
| many get confused by this | 01/01/70 00:00 | |
| Got it ! | 01/01/70 00:00 | |
| per-pin, per-port, and whole-chip limits | 01/01/70 00:00 | |
| strictly speaking... | 01/01/70 00:00 | |
| Slight oversimplification | 01/01/70 00:00 | |
| it used to be DC, now it is AC | 01/01/70 00:00 | |
"per pin" | 01/01/70 00:00 | |
| Good post! | 01/01/70 00:00 | |
| Excellent Community | 01/01/70 00:00 | |
| have you read "the bible" | 01/01/70 00:00 | |
| Yes, I have started | 01/01/70 00:00 |