On Tue, Apr 10, 2012 at 9:56 AM, Steve Stallings <[email protected]> wrote:
> 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. Couldn't you steal power from some other place on the computer side of the optocoupler? e.g. a power-only pigtail to the nearest USB port? ------------------------------------------------------------------------------ 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
