PDF: 09005aef818e3fc8/Source: 09005aef818e3fdb Micron Technology, Inc., reserves the right to change products or specifications without notice.
HTF36C256_512x72.fm - Rev. C 1/07 EN
16 ©2005 Micron Technology, Inc. All rights reserved.
2GB, 4GB (x72, ECC, DR) 240-Pin DDR2 SDRAM RDIMM
Serial Presence-Detect
Notes: 1. The
t
RC SPD values shown are JEDEC DDR2 device specification values. The actual Micron
DDR2 device specification is
t
RC = 55ns for all speed grades.
45
SDRAM device MAX read data hold skew factor,
t
QHS
-80E/-800
-667
-53E
-40E
1E
22
28
2D
1E
22
28
2D
46
PLL relock time
15µs 0F 0F
47–61
Optional features, not supported
00 00
62
SPD revision
Release 1.2 12 12
63
Checksum for bytes 0–62
ECC/ECC and Parity
-80E
-800
-667
-53E
-40E
–/31
D2/D6
ED/F1
98/9C
FF/03
50/54
F1/F5
0C/10
B7/BB
1E/22
64
Manufacturer’s JEDEC ID code
MICRON 2C 2C
65–71
Manufacturer’s JEDEC ID code
(continued) FF FF
72
Manufacturing location
01–12 01–0C 01–0C
73–90
Module part number (ASCII)
Variable data Variable data
91
PCB identification code
1–9 01–09 01–09
92
Identification code (continued)
00000
93
Year of manufacture in BCD
Variable data Variable data
94
Week of manufacture in BCD
Variable data Variable data
95–98
Module serial number
Variable data Variable data
99–127
Reserved for manufacturer-specific data
00 00
128–255
Reserved for customer use
FF FF
Table 16: Serial Presence-Detect Matrix (continued)
Byte Description Entry (Version) 2GB 4GB
