| ??? 10/27/05 14:07 Read: times |
#103033 - Good clues! Responding to: ???'s previous message |
Erik,
Ah-ha! If this is the case, our problem is definitely at the programmer end. The ZIF socket looks pretty old and has a tarnish on the most of the contacts. I'll give it a try. Thanks! tom Erik Malund said:
We have several "industrial strength" prograsmmers here and see the same problem. Some chips (more for some brands than others) show "wrong device ID" and fortunately our programmers allow ignoring this.
I surmised that the problem is that reading device ID is done using extremely low currents. Based on that theory I tried cleaning the programmer socket till a shine and sanding the uC pins with extremely fine (800 grit) sandpaper. This made the ID read. This is as much of a "proof" for my theory as i can provide. Erik |
| Topic | Author | Date |
| 87C54X2 device ID oddity | 01/01/70 00:00 | |
| reading device ID | 01/01/70 00:00 | |
Good clues! | 01/01/70 00:00 |