[DSP-10] For Jonathon Ayres

[dsp-10@mailman.qth.net]

Hi Jonathon....
Thanks for your reply to my question last week...about the  Pin P3/20 problem.

I have been searching again on the diagramm of the EZ-Kit and on the board 
itself.
Its for shure somekind of electrostatic problem...its not a "pressure", or 
bad solder joint problem. The same thing happend to a second
EZ Board from Walter...but not as strong as over here.

Firstoff things here are running quite well, since I put this 10 k resistor 
from Pin 20 P3 to GND......

Now I took a close look again...Pin 20 of P3 is directly connected to Pin 125 
at the ADSP 2181, called IAL and its left open..
No pullup or pulldown resistor is connected to it, so far I can see !!!!

As soon as my fingers get close to the top of the ADSP 2181, Pin 125 is 
cetching some electrostatic charge. No pressure is
needed to do this. Furtheron I have to mention that the air over here is 
very, very dry which is allways a good source for static electricity.
Very often I can feel this.!!! hi

In the meantime I checked all the pullup resistors (R5, R21 etc.).....they 
are ok....in order to there Voltage...(5Volts).

So, wy did they (AD) left IAL (Pin 125) open ??? Good question ??

Answers wellcome...
best 73 de hermann