mt16htf25664ay-80e Micron Semiconductor Products, mt16htf25664ay-80e Datasheet - Page 18

• Manufacturer Part Number: mt16htf25664ay-80e
• Description: 512mb, 1gb, 2gb, 4gb X64, Dr 240-pin Ddr2 Sdram Udimm
• Manufacturer: Micron Semiconductor Products

Table 18:
PDF: 09005aef80f09084/Source: 09005aef80f09068
HTF16C64_128_256x64A.fm - Rev. F 8/07 EN
128–255 Reserved for customer-specific data
99–127
47–61
65–71
73–90
95–98
Byte
40
41
42
43
44
45
46
62
63
64
72
91
92
93
94
Description
Extension for bytes 41 and 42
MIN active-to-active/refresh time,
MIN AUTO REFRESH-to-ACTIVE/AUTO
REFRESH command period,
SDRAM device MAX cycle time,
SDRAM device MAX DQS–DQ skew time,
t
SDRAM device MAX read data hold skew
factor,
PLL relock time
Optional features, not supported
SPD revision
Checksum for bytes 0–62 ECC/ECC and parity
Manufacturer’s JEDEC ID code
Manufacturer’s JEDEC ID code
Manufacturing location
Module part number (ASCII)
PCB identification code
PCB identification code (continued)
Year of manufacture in BCD
Week of manufacture in BCD
Module serial number
Reserved for manufacturer-specific data
DQSQ
Serial Presence-Detect Matrix (continued)
t
QHS
Notes:
1. The
DDR2 device specification is
t
512MB, 1GB, 2GB, 4GB (x64, DR) 240-Pin DDR2 SDRAM UDIMM
RC SPD values shown are JEDEC DDR2 device specification values. The actual Micron
t
RFC
t
CK (MAX)
t
RC
1
Entry (Version)
-800/-667/-53E
(continued)
Release 1.2
t
18
-800/-667
-53E/-40E
-80E/-800
-800/-80E
RC = 55ns for all speed grades.
MICRON
-1GA
-1GA
-1GA
-1GA
-1GA
1–12
-80E
-80E
-40E
-667
-53E
-40E
-667
-53E
-40E
-80E
-800
-667
-53E
-40E
1–9
n/a
–
–
–
–
–
–
–
–
–
–
Micron Technology, Inc., reserves the right to change products or specifications without notice.
Variable
Variable
Variable
Variable
–/3C/3C
512MB
01–0C
01–09
data
data
data
data
–/00
2D
ED
4B
2C
00
37
80
18
1E
23
22
28
00
00
12
98
00
00
00
FF
FF
–
–
–
–
–
–
–
–
–
–
–
Variable
Variable
Variable
Variable
01–0C
01–09
data
data
data
data
1GB
2D
3C
4C
2C
30
00
00
39
37
69
80
14
18
1E
23
1E
22
28
00
00
12
90
31
F7
5E
00
00
00
FF
Serial Presence-Detect
–
–
–
–
–
©2003 Micron Technology, Inc. All rights reserved.
Variable
Variable
Variable
Variable
01–0C
01–09
data
data
data
data
2GB
3A
2D
CD
D2
ED
3C
2C
06
36
06
06
39
37
7F
80
11
14
18
1E
23
19
1E
22
28
00
00
12
31
98
00
00
00
FF
FF
Variable
Variable
Variable
Variable
–/3C/3C
01–0C
01–09
data
data
data
data
4GB
–/00
00/–
C5
2C
80
18
1E
22
28
00
00
12
35
E0
00
00
00
FF
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–