| ??? 10/10/14 09:51 Read: times |
#190360 - more info Responding to: ???'s previous message |
We can't find the source (written 20+ years ago in a different country, original engineers retired or made redundant), so 'same binary' is really the key thing.
As we need to spin the board, PLCC/QFP is a realistic option which we would go for as NXP are still showing support. I'm not sure whether it's an FA or FB as the BOM still calls for an Intel part. I do know that it's got 4kB of PROM, and I would expect it to be a 12 clocker. I would bet the code is riddled with timing loops, so faster operation is a complete no-no. i guess the world of fuse settings beckons. |
| Topic | Author | Date |
| Any suggestions for P87C51F replacement? | 01/01/70 00:00 | |
| how critical is ... | 01/01/70 00:00 | |
| What MHz, Vcc, & exact part code ? | 01/01/70 00:00 | |
| more info | 01/01/70 00:00 | |
| Still no Vcc ? | 01/01/70 00:00 | |
| what about using an adapter? | 01/01/70 00:00 | |
| 5V VCC | 01/01/70 00:00 | |
| the rumors of the demise of the '51 are greatly exaggerated | 01/01/70 00:00 | |
| New 8051's | 01/01/70 00:00 | |
| RE: New 8051's | 01/01/70 00:00 | |
rejoice | 01/01/70 00:00 |