[Diy_efi] Re: diy_efi Digest, Vol 14, Issue 9

Bill Washington bill.washington at nec.com.au
Wed Nov 10 00:55:23 GMT 2004

	That signal looks to me like a clock, your DSO's bandwidth/slew rate may be preventing you seeing the full(true) excursion of the signals.


Message: 3
Date: Tue, 9 Nov 2004 00:15:54 -0500 (EST)
From: mbelloli at speedymotorsports.com
Subject: [Diy_efi] RE: looking for help with a prom N82S181
To: diy_efi at diy-efi.org
Cc: hexibot43 at yahoo.com
	<1081. at www.speedymotorsports.com>
Content-Type: text/plain;charset=iso-8859-1

     I realized I needed to give more information to go with my question. 
I have included a link to a web page I created.  I included some pics
from my DSO of the signals on the 4 chip enable pins.  I am hoping
someone can look at this a give me a clue.  I'm feeling pretty
clueless right now.  I'm not understanding the what I'm seeing.  I
especially don't understand  what I am seeing on pin 19.  It looks
like noise to me.
     Tomorrow, I'm going to look at the chip enable pin on a 27c256 I have
in another ecm.  I am hoping to get a clue from this.  But if anyone
has anything to add, please let me know.  I thought this was going to
be so simple.



Here is the link to a page with the pic's.


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