| ??? 04/11/06 23:47 Read: times |
#114122 - Mapping it out Responding to: ???'s previous message |
I am planning on replacing the AT89C55 with an AT89S52.
Only two of the Output lines of the 16V8A seem to be connected, they are connected to the IN1 and IN2 of this DC motor controller L6202; Basicly they decide if the motor turns and in which direction it turns: http://www.datasheetcatalog.com/datasheet...L602.shtml 6 of the 8 16V8A input lines are connected directly to the AT89C55. So yes I see what you mean, either I am to believe only two input lines are being used or there is some complicated scheme setup using all six bits. The registry possibility looks like it could really complicate matters, if they are used. If it gets too complicated I can bypass the 16V8A altogether and just connect two AT89S52 IO lines directly to the L6202. As far as mapping it I was considering making a program to do that, I was to increment through all possible inputs (the six bits) and feed the two outputs into two AT89S52 IO lines. Save the output to memory, then evaluate it on the PC. But that may oversimplify the process if there are registers present. I didn't realize they could be reprogrammed if they were security fused, I'll look into that, especially if they can be reprogrammed in circuit. |
| Topic | Author | Date |
| Lexmark Printer circuit board 'Hack' | 01/01/70 00:00 | |
| if you use an 's' device | 01/01/70 00:00 | |
| DC motor | 01/01/70 00:00 | |
| "clear it out" ??? | 01/01/70 00:00 | |
| will he not need some hardware as well | 01/01/70 00:00 | |
| Mapping it out | 01/01/70 00:00 | |
| They can be erased but not read | 01/01/70 00:00 | |
| actualy | 01/01/70 00:00 | |
| would it not be easier | 01/01/70 00:00 | |
That might not be so simple | 01/01/70 00:00 | |
| Certainly, he'll need a programmer | 01/01/70 00:00 |