source2 Posted June 14, 2005 Report Share Posted June 14, 2005 I have got a lot EProm (UV erasable) from 27c32- to 27c2042 (about 40 pieces)what can I do with this ICs. Some intresting project and a good programmerthans Quote Link to comment Share on other sites More sharing options...
prateeksikka Posted June 14, 2005 Report Share Posted June 14, 2005 with a standard lab tool programmer fill a preplanned data at all locations in the RAM say :AA BB CC DD EE FF GG HH II JJ KK LL MM NN OO PP QQ RR SS TT UU VV WW XX YY ZZand retrive it through a microcontroller into your PC as a text file( a notepad document)Wouldnt that be interesting if u r a newbie? its simple! 8) Quote Link to comment Share on other sites More sharing options...
source2 Posted June 16, 2005 Author Report Share Posted June 16, 2005 Hi Any project or something?! Quote Link to comment Share on other sites More sharing options...
prateeksikka Posted June 16, 2005 Report Share Posted June 16, 2005 this project mainly requires u to have a good hand one one programming language good luck! ;D Quote Link to comment Share on other sites More sharing options...
source2 Posted June 16, 2005 Author Report Share Posted June 16, 2005 Unfortunately, I cant write in one one language (Kettes számrendszer) but there arent any compiler Quote Link to comment Share on other sites More sharing options...
prateeksikka Posted June 18, 2005 Report Share Posted June 18, 2005 a part of your project would be to test if this ROM is ok.write data say FF into all locations of ROM through a parallel port interface like LAB TOOL 48. and retrieve the data back .Can u write some code in C or assembly language or even VB? ;D Quote Link to comment Share on other sites More sharing options...
source2 Posted June 19, 2005 Author Report Share Posted June 19, 2005 I have an experiment with EProm (D27128) I wired eight LED to the Data Pins and I give +5V to the ROM. (nothink happenned), but when I give +5V to P (program) PIn , some led lighted. If I put +5V to the A pins (a0,a1,a2,a3,etc) the led lighted a lot of varieties. Can you speak any other languages ? Quote Link to comment Share on other sites More sharing options...
prateeksikka Posted June 19, 2005 Report Share Posted June 19, 2005 hi there!by default u have 00 data at all locations in a ROM.So no LED had glown when u just give supply. When u make a data pin high u write 1 at some place which is reflected onto the data line so an LED had glown!in third case i guess the address and data lines may be multiplexed when u addressed a particular location,that particular data came onto the data bus and made the LED glow!good work buddy! keep it up! Quote Link to comment Share on other sites More sharing options...
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