Discontinued (9/98 - last order; 3/99 last ship)
IBM11T8645HP
8M x 64 144 PIN SO DIMM
Serial Presence Detect
Serial PD Data
Entry (Hexadecimal)
Byte #
SPD Entry Value
Description
Notes
0
1
Number of Serial PD Bytes Written during Production
Total Number of Bytes in Serial PD device
Fundamental Memory Type
128
256
80
08
2
EDO
12
02
3
Number of Row Addresses on Assembly
Number of Column Addresses on Assembly
Number of DIMM Banks
0C
0B
01
4
11
5
1
6 - 7
8
Data Width of Assembly
x64
4000
01
Voltage Interface Level of this Assembly
LVTTL
50ns
60ns
13ns
15ns
32
9
RAS Access
3C
0D
0F
10
11
CAS Access
DIMM Configuration Type
Non-Parity
00
12
13
14
Refresh Rate/Type
SR/2 (31.2 us)
x8
83
Primary DRAM Data Width
Error Checking DRAM Data Width
08
N/A
00
15 - 62 Reserved
Undefined
Checksum Data
IBM
00
63
Checksum for bytes 0 - 62
cc
1
64 - 71 Manufacturers’ JEDEC ID Code
A400000000000000
Toronto, Canada
Vimercate, Italy
91
53
72
Module Manufacturing Location
313154383634354850r
r2D35305420202020
ASCII ‘11T8645HP”R”-50T’
ASCII ‘11T8645HP”R”-60T’
73 - 90 Module Part Number
313154383634354850r
r2D36305420202020
2, 3
91 - 92 Module Revision Code
93 - 94 Module Manufacturing Date
95 - 98 Module Serial Number
99 - 127 Reserved
“R” plus ASCII blank
Year/Week Code
Serial Number
Undefined
rr20
yyww
ssssssss
00
4, 5
6
128 - 255 Open for Customer Use
Undefined
00
1. cc = Checksum Data byte, 00-FF (Hex)
2. “R” = Alphanumeric revision code, A-Z, 0-9
3. rr = ASCII coded revision code byte “R”
4. yy = Binary coded decimal year code, 00-99 (Decimal) ➔ 00-63 (Hex)
5. ww = Binary coded decimal week code, 01-52 (Decimal) ➔ 01-34 (Hex)
6. ss = Serial number data byte, 00-FF (Hex)
©IBM Corporation. All rights reserved.
Use is further subject to the provisions at the end of this document.
75H3164
GA14-4479-02
Rev 11/97
Page 5 of 32
IBM [ IBM ]
