On 06/20/2017 03:37 PM, andy pugh wrote: >> Do you need the level-shifters? > I don't know. I was intending to interface to generic p-port breakouts and > I think I had the impression that RPi inputs are not 5V-tolerant.
No, the RPi is not 5V tolerant. So generic parallel port requires level translation. > The GTL chip I used seems to us magic to perform bidirectional level > shifting. It is the Right Kind(TM) of magic employed (and if you look too closely, then Heisenberg will prevent you from discovering the real magic). What chip are you using? I did not notice any pull-ups, so I guess it must be an active translator chip you have. -- Greetings Bertho (disclaimers are disclaimed) ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
