| ??? 01/08/06 03:35 Read: times |
#106824 - thanks Responding to: ???'s previous message |
Mike, I was fighting and fighting after having built the programmer circuit. All the levels looked good, the appropriate mcu pins seemed to be pulled up and down correctly but it still wouldn't go.
I figured I should go through all the notes in response to my original query and Mike's was the one. I was not connecting PIN 9 (signal ground from PC) to my ground on the breadboard. Once I did that, all was well. Thanks to all, but especially to Mike Hymel. Of course, now I have to load my test prog, and build the other b-board, with the real live living program. Yippee! |
| Topic | Author | Date |
| ds89c420 programmer | 01/01/70 00:00 | |
| clarification | 01/01/70 00:00 | |
| schematic | 01/01/70 00:00 | |
| Now I understand what you mean... | 01/01/70 00:00 | |
| so, I'm correct? | 01/01/70 00:00 | |
| Yes, you are | 01/01/70 00:00 | |
| not to beat a dead horse | 01/01/70 00:00 | |
| Much more | 01/01/70 00:00 | |
| given | 01/01/70 00:00 | |
thanks | 01/01/70 00:00 | |
| DS89C420 ISP | 01/01/70 00:00 | |
| isp response | 01/01/70 00:00 | |
| External access | 01/01/70 00:00 | |
| caps for crystal | 01/01/70 00:00 | |
| Only NP0 ceramics! | 01/01/70 00:00 | |
| over my head | 01/01/70 00:00 | |
| NP0, X7R, Z5U | 01/01/70 00:00 | |
| digikey will be my friend | 01/01/70 00:00 | |
| Everybody probably already knows | 01/01/70 00:00 | |
| Overlapping standards | 01/01/70 00:00 | |
| holy moly | 01/01/70 00:00 | |
| Oh dear...! | 01/01/70 00:00 | |
| now you're playing me right? | 01/01/70 00:00 | |
| Not really | 01/01/70 00:00 | |
| yes really ;) | 01/01/70 00:00 | |
| one more thing | 01/01/70 00:00 | |
| Sure | 01/01/70 00:00 | |
| max232 charge caps | 01/01/70 00:00 | |
| Yes | 01/01/70 00:00 | |
| a good reference for this . . . | 01/01/70 00:00 | |
| thx | 01/01/70 00:00 |