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ds89c450 expresssch
Oh! My mistake then. I have been working with the old AT89S8252 at the university. Since it has the same architecture (8051) I thougth that the DS89C450 had the exactly the same functions. I really haven't had time to take a good look at it's specifications. If it has two...
mtk ds89c430
Hi again!
First of all I'd like to apologize for haven't posted the final result yet, but I've been full of work at the university. I barely don't have time to sleep :( I am thinking about making a testboard too. Without a ZIF connector (they're very hard to find here in Portugal...
ds89c430 bootloader
Hi!
I'm sorry but I didn't had time to make the final schematic and PCB again. I have so many things to do for the university and so many things to study for the exams. but as soon as I get some time I'll make it. I'll try to make what you requested but I can't guarantee...
ds89c450 needs reset
Hi everyone again!
I finally solved the problem. I talked to my teacher again and we spent some time analyzing the board and we found the problem. I had to make 2 changes in the circuit.
1 - In the schematic the ground connection of the serial port is missing. I made that...
programmer sn74hc125n
I already thought about it.. but I talked to one of my teachers from the University and he told me that there wouldn't be a problem to use it because it is a basic Serial communication system using only 3 lines. He said that if the programmer needed to use more pins to...
expresssch dallas
Thanks! I'll take a look at the link that you posted. If I keep having problems.. I'll let you know.
Thank you for answering :)
Added after 45 minutes:
Hi again!
I did what you said but it didn't work :( I still can't connect . I always get the message:
"Unable to...
ds89c450 programmer
Hi everyone!
I am currently trying to make a programmer for DS 89C430 \ DS89C450. However I am having some problems in making it to work. first of all, the schematic I used is the following (I think it is based on the Dallas Maxim Application Note about In System...
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