| ??? 09/29/07 21:00 Read: times |
#145121 - Answers!!! Responding to: ???'s previous message |
1) is the crystal and the burden caps connected with less than 0.5" traces?
Please tell me what is this 0.5''traces.(Sorry) 2) is there a 10-100 nF cap DIRECTLY between vcc and gnd pins? I think this you are saying to avoid any transients.I have connected 1uf capacitor for that. 3) is Vcc the specified value all the time (use scope) Vcc is specified ( i will check with oscilloscope also) as i am using a voltage control regulator(LM7805). I am making a stand alone programmer so programmer is disconnected from the main circuit. I am making this circuit on a breadboard . Can it be a cause of problem?Secondly i have read in Mazidi's book that 8051 has a internal oscillator but you need an external clock to run it. So can i dump my code without connecting the oscillator and use an oscillator when i am using the microcontroller in a circuit? -- Richeek |
| Topic | Author | Date |
| Quartz Crystal Problem?? | 01/01/70 00:00 | |
| what is on XTAL2 ? | 01/01/70 00:00 | |
| Re:What is on Xtal2 | 01/01/70 00:00 | |
| I ment on the scope | 01/01/70 00:00 | |
| What is it?? | 01/01/70 00:00 | |
| no, of course not, | 01/01/70 00:00 | |
| almost the same value... | 01/01/70 00:00 | |
| 10mV - it is NOT running | 01/01/70 00:00 | |
| Answers!!! | 01/01/70 00:00 | |
| SI-Units | 01/01/70 00:00 | |
| It is a matter of convenience | 01/01/70 00:00 | |
| Breadboard vs PCB | 01/01/70 00:00 | |
| Breadboard vs Vector Board | 01/01/70 00:00 | |
| No! It's not the same thing | 01/01/70 00:00 | |
| wow, Richard | 01/01/70 00:00 | |
Simple metal plate won't work as ground plane | 01/01/70 00:00 | |
| Use a 10:1 probe, shows less capacitance | 01/01/70 00:00 |