Kirk Wallace wrote: >I have been trying to get a handle on what kind of signal to expect from >a parallel port. I have been used to expecting around 3 mA, which may or >may not source the current, and may be different between data and status >pins. This link seems to indicate 14 mA source and sink: >http://www.fapo.com/1284elec.htm > >I assume this link is based on the 1284 standard, so I should use that >as my reference? > > You should use the documented, or better measured, values for the particular parallel port you expect to use.
Not all parallel ports are to spec. Those that are built into chipsets are often incapable of outputting much current when in the high state. They can usually sink more though. - Steve ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
