512MB, 1GB, 2GB: (x64, DR) 240-Pin DDR2 SDRAM UDIMM
Serial Presence-Detect
Table 15: Serial Presence-Detect Matrix
“1”/“0”: Serial Data, “driven to HIGH”/“driven to LOW”; table notes located on page 19
Byte
Description
Entry (Version) MT16HTF6464A MT16HTF12864A MT16HTF25664A
0
1
2
3
4
128
256
80
08
08
0D
0A
80
08
08
0E
0A
80
08
08
0E
0A
Number of SPD bytes used by Micron
Total number of bytes in SPD device
Fundamental memory type
DDR2 SDRAM
13, 14
Number of row addresses on assembly
10
Number of column addresses on
assembly
5
6
7
8
9
1.18in, dual rank
61
40
00
05
61
40
00
05
61
40
00
05
DIMM height and module ranks
Module data width
64
0
Reserved
SSTL 1.8V
Module voltage interface levels
DDR2 cycle time, tCK (CL = MAX value,
see byte 18)
-80E
-667
-53E
-40E
–
25
30
3D
50
25
30
3D
50
30
3D
50
DDR2 access from clock,tAC (CL = MAX
value, see byte 18)
10
-80E
-667
-53E
-40E
–
40
45
50
60
40
45
50
60
45
50
60
11
12
13
00
82
08
00
82
08
00
82
08
Module configuration type
Refresh rate/type
7.81µs/self
8
DDR2 SDRAM device width (primary
device)
14
15
16
17
18
N/A
1 clock
4, 8
00
00
0C
04
00
00
0C
04
00
00
0C
08
Error-checking DDR2 data width
Reserved
Burst lengths supported
Number of banks on DDR2 device
CAS latencies supported
4 or 8
-80E (6, 5, 4)
-667 (5, 4, 3)
-53E/-40E (4, 3)
–
38
18
30
38
18
30
38
18
19
20
21
22
01
02
00
01
02
00
01
02
00
Module thickness
Unbuffered
DDR2 DIMM type
DDR2 module attributes
-80E/-667
-53E/-40E
03
01
03
01
03
01
DDR2 device attributes: weak driver
(01) or 50Ω ODT (03)
DDR2 cycle time, tCK, MAX CL - 1
23
24
-80E/-667
-53E
3D
50
50
3D
50
50
3D
50
50
-40E
SDRAM access from CK, tAC,
MAX CL - 1
-80E
-667
-53E
-40E
–
40
45
50
60
40
45
50
60
45
50
60
SDRAM cycle time, tCK, MAX CL - 2
25
26
27
-80E
-667
-53E/-40E(N/A)
–
50
00
00
50
00
00
50
00
SDRAM access from CK, tAC,
MAX CL - 2
-80E
-667
-53E/-40E(N/A)
–
45
00
00
45
00
00
45
00
MIN row precharge time, tRP
-80E
-667/-53E/-40E
–
3C
32
3C
32
3C
PDF: 09005aef80f09084/Source: 09005aef80f09068
HTF16C64_128_256x64AG.fm - Rev. D 5/06 EN
Micron Technology, Inc., reserves the right to change products or specifications without notice.
©2003 Micron Technology, Inc. All rights reserved.
17
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