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Unfortunately some newer main boards have 3,3V signals on the parallel port.
But using one LVC octal buffer solves the problem, and it can be powered through the parallel port as well. Georg Bende Softwareentwickler Abteilung Elektronik Dr. Fritz Faulhaber GmbH & Co KG Daimlerstr. 23 71101 Schaich Tel: +49 7031 638294 > -----Ursprgliche Nachricht----- > Von: joncas04 [mailto:] > Gesendet: Freitag, 14. Mai 2004 18:45 > An: > Betreff: [motoroladsp] jtag command converter > Hello > > Would anyone be able to recommend an economical JTAG command > converter, either to > USB or parellel (printer port) for use with Metrowerks > Codewarrior on a 568000/E device? > Or what is the simplest design to make ones own? > The evaluation boards from Motorola incorporate various > designs on-board, allowing both > 5 V and 3,3 V levels on the printer port side and requiring > two octal buffers to achieve the > translation -- is that really needed? > Don't all current printer ports work on the same 5 V level? > > Many thanks! > Robert Imhoff > > ------------------------ Yahoo! Groups Sponsor > ---------------------~--> > Make a clean sweep of pop-up ads. Yahoo! Companion Toolbar. > Now with Pop-Up Blocker. Get it for free! > http://us.click.yahoo.com/L5YrjA/eSIIAA/yQLSAA/PNArlB/TM > -------------------------- > -------~-> > > _____________________________________ > Note: If you do a simple "reply" with your email client, only > the author of this message will receive your answer. You > need to do a "reply all" if you want your answer to be > distributed to the entire group. > > _____________________________________ > About this discussion group: > > To Join: > > To Post: > > To Leave: > > Archives: http://www.yahoogroups.com/group/motoroladsp > > More Groups: http://www.dsprelated.com/groups.php3 > > Yahoo! Groups Links > |