| ??? 06/20/06 09:03 Read: times |
#118588 - answers Eric Responding to: ???'s previous message |
Erik Malund said:
Tony wrote : "The CEX4 pin is next to the RESET pin. Is there any chance that a connection/short has 'developed' between these 2 pins?"
You replied: "Corncerning the short, No ! I have tested that" "Now you post: I find the solution. It was a hardware problem . It fact CEX4 was short to a line on the pcb . This line was the transistor who driving the reset generator. so you "knew" that there was no short. The danger of I know is that we all at some times "know" something that is not true. If a possibility is brought up and you "know" that it is not so, the least you can do is check again. I doubt there is any seasoned member here that has not at some time found out that what they "knew" was not so. Erik Yes you are right !! But when I test the short with a meter .Inpedance between pins was the same than aonther. Because the short was on the reset generator and not on the P89C51 pins. And now many components have got a lot of errata , and before sending a note in this forum , I did a lot of checking. Have a nice day , and thanks for your help ! |
| Topic | Author | Date |
| Strange behavior with P89C51RD2 | 01/01/70 00:00 | |
| well it is the "Intel kluge" and a guess | 01/01/70 00:00 | |
| Remote Possibility | 01/01/70 00:00 | |
| short | 01/01/70 00:00 | |
| Please explain | 01/01/70 00:00 | |
| answers erick | 01/01/70 00:00 | |
| I take the WDTE is a zero, also .. | 01/01/70 00:00 | |
| Fixed !!! | 01/01/70 00:00 | |
| The danger of I know | 01/01/70 00:00 | |
answers Eric | 01/01/70 00:00 |