| ??? 10/22/07 13:41 Read: times |
#146006 - a) ----- option only Responding to: ???'s previous message |
Erik Malund said:
I am trying to connect uarts using twisted pair cable
you do not say how a) direct uC TxD to uC RxD? b) using RS232 transceivers? c) using 422 transceivers? d) using 485 transceivers? e) using something else? for a) and b) twisted pair makes no difference for c) and d) is (should be) required for e) who knows? Erik Yep, The UARTS directly TXD with RXD . I couldnt comprehend when you say "twisted pair makes no difference" . Lastly if things go wrong I know, I will have to use RS232 or RS485. But lets see if anyone is confident enough and gives me enough moral to go for the design :). Please see If we can use shielded cable and Ground at one side of the circuit board. Thanks all for your time APC |
| Topic | Author | Date |
| UART Maximum | 01/01/70 00:00 | |
| Baud rate ? | 01/01/70 00:00 | |
| Baud | 01/01/70 00:00 | |
| RS232? | 01/01/70 00:00 | |
| 100m on 4800 BPS | 01/01/70 00:00 | |
| How? | 01/01/70 00:00 | |
| true RS232 | 01/01/70 00:00 | |
| you do not say how | 01/01/70 00:00 | |
| a) ----- option only | 01/01/70 00:00 | |
| Twisted Pair | 01/01/70 00:00 | |
| He would not be THAT ignorant, I hope | 01/01/70 00:00 | |
| a much better idea | 01/01/70 00:00 | |
| Assumption | 01/01/70 00:00 | |
| a much better idea | 01/01/70 00:00 | |
| WRONG | 01/01/70 00:00 | |
| panacea ---> The Godess of all cure :) | 01/01/70 00:00 | |
| of course, you need to connect gnd | 01/01/70 00:00 | |
| ground problem isnt a problem | 01/01/70 00:00 | |
| Call a spade a spade... | 01/01/70 00:00 | |
| no, it is not | 01/01/70 00:00 | |
| Differential | 01/01/70 00:00 | |
| no, it is not | 01/01/70 00:00 | |
| Oh yes it is! | 01/01/70 00:00 | |
| since you control both ends ... | 01/01/70 00:00 | |
| Minimum RS422/485 | 01/01/70 00:00 | |
| mimum length for 485/422 | 01/01/70 00:00 | |
Thanks for the input to all | 01/01/70 00:00 |