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From: jones@optilink.UUCP (Marvin Jones)
Newsgroups: comp.sys.mac.hardware
Subject: Re: SIMM schematic
Summary: SIMM pinouts
Message-ID: <2787@optilink.UUCP>
Date: 13 Dec 89 18:49:47 GMT
References: <976@ux.acss.umn.edu>
Distribution: usa
Organization: Optilink Corporation, Petaluma, CA
Lines: 65

In article <976@ux.acss.umn.edu>, keith@ux.acss.umn.edu (Keith MaloneyHuss) writes:
> Does anyone know where I can find the pin-outs (tab-outs) for a SIMM?
> I have several 256K SIMMs that I would rather do something with other than
> make earrings out of them.  I tried sci.electronics and the one response
> I received was a request for a copy of the pin-outs.
> Thanks.
> 
> --keith

I saw the original posting, but passed it by thinking you would get swamped 
with responses.  Following is a list of the signals for a full 1M x 9 SIMM. The 
512K and 256K SIMMs are identical, without the use of the A9 lead.  If you are 
using 8 bit wide SIMMs, the D9 and Q9 leads are unused.  Numbering starts 
(pin 1) at the end of the SIMM with the "notch" or "shoulder".  

Pin     Function 
---     ----------------- 
1       Vdd 
2       /CAS 
3       DQ1
4       A0 
5       A1 
6       DQ2 
7       A2 
8       A3 
9       Vss 
10      DQ3 
11      A4 
12      A5 
13      DQ4 
14      A6 
15      A7 
16      DQ5 
17      A8 
18      A9 
19      n.c. 
20      DQ6 
21      /W
22      Vss 
23      DQ7 
24      /PRD 
25      DQ8 
26      Q9 
27      /RAS
28      /CAS9
29      D9 
30      Vdd 

Note that functions preceeded by "/" indicate negative logic.  

Pinouts for memory SIPs (with pins instead of fingers) are identical. 

All information excerpted from the Micron Technology Memory Products brochure 
dated 8/87.  

Hope this helps.  Good Luck with your project.  Let us know what you came up 
with, since we all have drawers full of these things ;-)  

Regards, 
 
-- 
	Marvin Jones 		 uucp:    {pyramid, tekbspa}!optilink!jones
	Optilink Corp. 		 bell-net: 707-795-9444 X 206 
	Petaluma, CA             CI$: 	   71320,3637