| ??? 03/05/09 02:41 Read: times |
#163079 - where I measured it... Responding to: ???'s previous message |
Sorry, I forgot to say where I put the scope leads. The positive scope lead was placed at pin 3 and the negative lead was placed at pin 5 of the DB9 connector connected to the MAX232 chip. Pin 3 of the DB9 runs to pin 14 of the MAX232 and pin 5 goes to GND.
Also, the voltages displayed on the scope are 5 volts per division if that helps clarify the signal levels. Thanks again, Brian |
| Topic | Author | Date |
| serial comm problem | 01/01/70 00:00 | |
| what about TI? | 01/01/70 00:00 | |
| thank you | 01/01/70 00:00 | |
| Be better... | 01/01/70 00:00 | |
| no luck | 01/01/70 00:00 | |
| Settings | 01/01/70 00:00 | |
| What is your XTAL frequency ? | 01/01/70 00:00 | |
| parity and XTAL | 01/01/70 00:00 | |
| Eh ? | 01/01/70 00:00 | |
| one or the other | 01/01/70 00:00 | |
| my mistake | 01/01/70 00:00 | |
| scope pictures | 01/01/70 00:00 | |
| whatizit? | 01/01/70 00:00 | |
| where I measured it... | 01/01/70 00:00 | |
| waveforms look OK | 01/01/70 00:00 | |
| question | 01/01/70 00:00 | |
| LSBit comes first after startbit | 01/01/70 00:00 | |
| cable | 01/01/70 00:00 | |
| isolation and ESD protection | 01/01/70 00:00 | |
I have blown very few, if any, MAX232's | 01/01/70 00:00 | |
| Your scope trace looks normal | 01/01/70 00:00 | |
| more pics | 01/01/70 00:00 | |
| show picture at PC side | 01/01/70 00:00 |