> -----Original Message----- > From: Sebastian Kuzminsky [mailto:[email protected]] > Sent: Monday, April 09, 2012 6:02 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Hal_parport and EPP > <snip> > > Simply switching the port to EPP mode doesn't accomplish anything. >
Simply switching the port to EPP mode DOES accomplish one significant thing. Those outputs that are open collector with pull-ups in regular mode become Totem-Pole driven outputs when in EPP mode. This change is significant for the Gecko G540 which needs the extra drive current when the output is a logic one. The inputs to the G540 are unbuffered optocoupler LEDs and there is no source of power on that side of the interface in the G540, so adding a buffer or additional pull-ups inside the G540 is not possible. Steve Stallings ------------------------------------------------------------------------------ Better than sec? Nothing is better than sec when it comes to monitoring Big Data applications. Try Boundary one-second resolution app monitoring today. Free. http://p.sf.net/sfu/Boundary-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
