> From:         Wouter van Ooijen[SMTP:wouter@VOTI.NL]
> Sent:         Monday, February 09, 2004 4:40 PM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      Re: [PIC]: PIC programmer puzzle

>> Line termination must be done at both ends of the line.

> I would be surprised if that was the problem. In my programmer I have
> resistors (47 ohm) at the programmer side only. I have used cables up to
> 2 meter without any problem.

> Wouter van Ooijen

47 ohms may be closer to the characteristic impedance of the line. Absorption
of the reflected voltage is optimal only if the terminating resistor has resistance
equal to that of the line. Perhaps 2k is too large to do this.

John Power

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads