On Fri, 2011-01-21 at 13:56 +0100, joachim.fra...@pibf.de wrote: > > > On Tue, 2011-01-18 at 13:32 -0800, Kirk Wallace wrote: > > > > The ATxmega runs on 3.6V max, so my current task is to design a parallel > > port interface that can use 3 to 5V in, and feed ~3V to the xmega. After > > the data link is worked out, the xmega can be used to produce a wide > > range of signals (step/dir, PWM, 3-phase) and capture input (encoders, > > ADC). > Last year I work also with some 3.3V elektronics. > > Output from parallel port: > I measured the voltage of my parallel port and found, > that it was only 3.6V. So I insert only a resistor into > each data line. It works also without this resistor. > > Input to parallel port: > Receiving the signals from 3.3V outputs was no > problem. > > Joachim Franek
It looks like most, if not all, PCI parallel port cards use 5 Volts, and may have an advantage if a long cable is used. With a longer cable, there may be other termination issues to address. Time will tell. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! Finally, a world-class log management solution at an even better price-free! Download using promo code Free_Logger_4_Dev2Dev. Offer expires February 28th, so secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsight-sfd2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
