| ??? 02/12/07 20:03 Read: times |
#132659 - ALE not working |
Hello all,
I just bought four new 80c552EFA microcontrollers and ALE signal is not working on all four (checked with an oscilloscope). I don't think that all are burned (I hope!) so it must be something I don't know. The configuration of my board is pretty standard. I use a 74hct573 latch, 62256 SRAM, 27c256 EPROM. All components are new. Any idea? |
| 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 |