IBM13N16644JCA
IBM13N16734JCA
16M x 64/72 One-Bank Unbuffered SDRAM Module
Serial Presence Detect (Part 2 of 2)
Serial PD Data Entry (Hexa-
Byte #
63
Description
SPD Entry Value
Notes
2
decimal)
Checksum for bytes 0 - 62
Checksum Data
IBM
cc
64 - 71 Manufacturers’ JEDEC ID Code
A400000000000000
Toronto, Canada
Vimercate, Italy
91
53
72 Module Manufacturing Location
16M x 64,
-75A
31334E31363634344A43
rr2D373541542020
ASCII ‘13N16644JC”R”-75AT’
ASCII ‘13N16734JC”R”-75AT’
3, 4
73 - 90 Module Part Number
16M x 72,
-75A
31334E31363733344A43
rr2D373541542020
91 - 92 Module Revision Code
93 - 94 Module Manufacturing Date
95 - 98 Module Serial Number
99 - 125 Reserved
“R” plus ASCII blank
Year/Week Code
Serial Number
Undefined
rr20
yyww
ssssssss
00
5, 6
7
8
8
126
127
Module Supports this Clock Frequency
Attributes for Clock Frequency defined in byte 126
100 MHz
64
CK0, CK2, CL3,
concurrent AP
A5
00
128 - 255 Open for Customer Use
Undefined
1. See the AC output load circuit in the AC Characteristics section below
2. cc = Checksum Data byte, 00-FF (Hex)
3. “R” = Alphanumeric revision code, A-Z, 0-9
4. rr = ASCII coded revision code byte “R”
5. yy = Binary coded decimal year code, 00-99 (Decimal) 00-63 (Hex)
6. ww = Binary coded decimal week code, 01-52 (Decimal) 01-34 (Hex)
7. ss = Serial number data byte, 00-FF (Hex)
8. For PC-100 applications only.
09K3606.F38386
8/99
©IBM Corporation. All rights reserved.
Use is further subject to the provisions at the end of this document.
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