Post by thread:What's the trick? SX18 w/Murata 50MHz resonator

AAAHHHHH .... What is the trick? I've been trying all day to get an Scenix SX-18 (datecode 9818 and 9849) to run using a Murata 50 MHz (through hole) resonator (as available from Parallax). I've reviewed Scenix's and Parallax's web sites for resonator recommendations, and can not seem to find that one thing (I hope) I'm missing. Using a 100k or 1Mohm resistor across OSC1 and OSC2 with a 20 MHz Murata resonator produces a beautiful sinewave. However, when I replace the 20 MHz with a 50, and the 1Mohm with a 10k (as recommended by Scenix, specifically for the Murata resonators), I can not get any oscillation at all!!! Using the SX-Key, all works well, in fact, my program is even working now!! (finally). I just can make it stand-alone!! Any thoughts? Mitch Miller, Omaha, NE spam_OUTmdmiller2TakeThisOuThome.com

Have You checked the osc_considerations.pdf from scenix wep pages? {Quote hidden}> > AAAHHHHH .... What is the trick? I've been trying all day to get an Scenix > SX-18 (datecode 9818 and 9849) to run using a Murata 50 MHz (through hole) > resonator (as available from Parallax). > > I've reviewed Scenix's and Parallax's web sites for resonator > recommendations, and can not seem to find that one thing (I hope) I'm > missing. > > Using a 100k or 1Mohm resistor across OSC1 and OSC2 with a 20 MHz Murata > resonator produces a beautiful sinewave. However, when I replace the 20 MHz > with a 50, and the 1Mohm with a 10k (as recommended by Scenix, specifically > for the Murata resonators), I can not get any oscillation at all!!! > > Using the SX-Key, all works well, in fact, my program is even working now!! > (finally). I just can make it stand-alone!! > > Any thoughts? > > > Mitch Miller, Omaha, NE > .....mdmiller2KILLspam@spam@home.com > ============================== Ruben Jvnsson AB Liros Elektronik Box 9124, 200 39 Malmv, Sweden TEL INT +4640 142078 FAX INT +4640 947388 rubenKILLspam2.sbbs.se ==============================