# 72 pin ECC SIMM

SIMM=Single Inline Memory Module
ECC=Error Correcting Code.

(at the computer)

72 PIN SIMM at the computer.

Pin | ECC | Optimized | Description
--- | --- | --- | ---
1 | VSS | VSS | Ground
2 | DQ0 | DQ0 | Data 0
3 | DQ1 | DQ1 | Data 1
4 | DQ2 | DQ2 | Data 2
5 | DQ3 | DQ3 | Data 3
6 | DQ4 | DQ4 | Data 4
7 | DQ5 | DQ5 | Data 5
8 | DQ6 | DQ6 | Data 6
9 | DQ7 | DQ7 | Data 7
10 | VCC | VCC | +5 VDC
11 | PD5 | PD5 | Presence Detect 5
12 | A0 | A0 | Address 0
13 | A1 | A1 | Address 1
14 | A2 | A2 | Address 2
15 | A3 | A3 | Address 3
16 | A4 | A4 | Address 4
17 | A5 | A5 | Address 5
18 | A6 | A6 | Address 6
19 | n/c | n/c | Not connected
20 | DQ8 | DQ8 | Data 8
21 | DQ9 | DQ9 | Data 9
22 | DQ10 | DQ10 | Data 10
23 | DQ11 | DQ11 | Data 11
24 | DQ12 | DQ12 | Data 12
25 | DQ13 | DQ13 | Data 13
26 | DQ14 | DQ14 | Data 14
27 | DQ15 | DQ15 | Data 15
28 | A7 | A7 | Address 7
29 | DQ16 | DQ16 | Data 16
30 | VCC | VCC | +5 VDC
31 | A8 | A8 | Address 8
32 | A9 | A9 | Address 9
33 | n/c | n/c | Not connected
34 | /RAS1 | /RAS1 | Row Address Strobe 1
35 | DQ17 | DQ17 | Data 17
36 | DQ18 | DQ18 | Data 18
37 | DQ19 | DQ19 | Data 19
38 | DQ20 | DQ20 | Data 20
39 | VSS | VSS | Ground
40 | /CAS0 | /CAS0 | Column Address Strobe 0
41 | A10 | A10 | Address 10
42 | A11 | A11 | Address 11
43 | /CAS1 | /CAS1 | Column Address Strobe 1
44 | /RAS0 | /RAS0 | Row Address Strobe 0
45 | /RAS1 | /RAS1 | Row Address Strobe 1
46 | DQ21 | DQ21 | Data 21
47 | /WE | /WE | Read/Write
48 | /ECC | /ECC |
49 | DQ22 | DQ22 | Data 22
50 | DQ23 | DQ23 | Data 23
51 | DQ24 | DQ24 | Data 24
52 | DQ25 | DQ25 | Data 25
53 | DQ26 | DQ26 | Data 26
54 | DQ27 | DQ27 | Data 27
55 | DQ28 | DQ28 | Data 28
56 | DQ29 | DQ29 | Data 29
57 | DQ30 | DQ30 | Data 30
58 | DQ31 | DQ31 | Data 31
59 | VCC | VCC | +5 VDC
60 | DQ32 | DQ32 | Data 32
61 | DQ33 | DQ33 | Data 33
62 | DQ34 | DQ34 | Data 34
63 | DQ35 | DQ35 | Data 35
64 | n/c | DQ36 | Data 36
65 | n/c | DQ37 | Data 37
66 | n/c | DQ38 | Data 38
67 | PD1 | PD1 | Presence Detect 1
68 | PD2 | PD2 | Presence Detect 2
69 | PD3 | PD3 | Presence Detect 3
70 | PD4 | PD4 | Presence Detect 4
71 | n/c | DQ39 | Data 39
72 | VSS | VSS | Ground

Contributor: Joakim Ögren

Source:
Various productsheets at IBM Memory Products

Copyright © The Hardware Book Team 1996-2001.
May be copied and redistributed, partially or in whole, as appropriate.
Document last modified: 2001-06-07