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IBM11N8645B
IBM11N8645C
8M x 64/72 DRAM MODULE
IBM11N8735B
IBM11N8735C
IBM Corporation. All rights reserved.
Use is further subject to the provisions at the end of this document.
Page 6 of 33
75H1747
SA14-4624-04
Revised 3/97
Serial Presence Detect
SPD Entry Value
Serial PD Data Entry (Hexadecimal)
Byte #
Description
0
Number of Serial PD Bytes Written during Production
128
80
08
02
0C
0B
0A
0B
02
4000
4800
01
3C
46
0F
14
00
02
00
04
00
04
00
cc
1
Total Number of Bytes in Serial PD device
256
2
Fundamental Memory Type
EDO
3
Number of Row Addresses on Assembly
12
11
4
Number of Column Addresses on Assembly
10
11
5
Number of DIMM Banks
2
6 - 7
Data Width of Assembly
8M x 64
x64
8M x 72
x72
8
Voltage Interface Level of this Assembly
LVTTL
9
RAS Access
60ns
70ns
10
CAS Access
15ns
20ns
11
DIMM Configuration Type
8M x 64
Non-Parity
8M x 72
ECC
12
Refresh Rate/Type
Normal 15.6us
13
Primary DRAM Data Width
x4
14
Error Checking DRAM Data Width
8M x 64
N/A
8M x 72
x4
15 - 62
63
64 - 71
Reserved
Checksum for bytes 0 - 62
Manufacturers’ JEDEC ID Code
Undefined
Checksum Data
IBM
Toronto, Canada
Vimercate, Italy
ASCII ‘11N8645BB”R”-60J’
ASCII ‘11N8645CB”R”-60J’
ASCII ‘11N8735BB”R”-60J’
ASCII ‘11N8735CB”R”-60J’
“R” plus ASCII blank
Week/Year Code
Serial Number
Undefined
Undefined
A400000000000000
91
53
72
Module Manufacturing Location
73 - 90
Module Part Number
(70ns examples not shown)
8M x 64
8M x 64
8M x 72
8M x 72
31314E383634354242rr2D36304A20202020
31314E383634354342rr2D36304A20202020
31314E383733354242rr2D36304A20202020
31314E383733354342rr2D36304A20202020
rr20
wwyy
ssssssss
00
00
91 - 92
93 - 94
95 - 98
99 - 127
128 - 255 Open for Customer Use
cc = Checksum Data byte, 00-FF (Hex)
“R” = Alphanumeric revision code, A-Z, 0-9
rr = ASCII coded revision code byte “R”
ww = Binary coded decimal week code, 01-52 (Decimal)
01-34 (Hex)
yy = Binary coded decimal year code, 00-99 (Decimal)
00-63 (Hex)
ss = Serial number data byte, 00-FF (Hex)
Module Revision Code
Module Manufacturing Date
Module Serial Number
Reserved
Discontinued (9/98 - last order; 3/99 last ship)