| ??? 02/13/07 09:25 Read: times |
#132735 - board continuity Responding to: ???'s previous message |
please continuity check to:
* xtal to pin uC * xtal to capacitor * EA pin * ALE pin(uC) to LE pin make sure the capacitor value for xtal is correct. make sure the RC reset value is correct. If all connection and componen value are correct try with other 40pin uC like at 80C31, 80C51, AT89C51 etc. If still not work, please chenge the X-tal. good luck regard hendry |
| Topic | Author | Date |
| ALE not working | 01/01/70 00:00 | |
| in reset? oscillator running? ALE open pin? | 01/01/70 00:00 | |
| ale not works | 01/01/70 00:00 | |
| remove the connection | 01/01/70 00:00 | |
| ale | 01/01/70 00:00 | |
| be sure the \'573\'s LE is not at GND! | 01/01/70 00:00 | |
| it's an easy layout error! | 01/01/70 00:00 | |
| Burden caps? | 01/01/70 00:00 | |
| EA | 01/01/70 00:00 | |
| board continuity | 01/01/70 00:00 | |
| Problem solved! Thanks everybody! | 01/01/70 00:00 | |
| what was wrong? | 01/01/70 00:00 | |
| not saying what does not give the next one | 01/01/70 00:00 | |
Yes, what was wrong?? | 01/01/70 00:00 |