256MB, 512MB, 1GB (x72, ECC, DR), PC3200
184-PIN DDR SDRAM UDIMM
Ta b le 21: Se ria l Pre se n ce -De t e ct Ma t rix
“1”/“0”: Serial Data, “driven to HIGH”/“driven to LOW”
BYTE
DESCRIPTION
ENTRY (VERSION) MT18VDDT3272A MT18VDDT6472A MT18VDDT12872A
0
1
2
3
128
256
80
08
07
0C
80
08
07
0D
80
08
07
0D
Number of SPD Bytes Used by Micron
Total Number of Bytes in SPD Device
Fundamental Memory Type
Number of Row Addresses on
Assembly
SDRAM DDR
12, 13
4
Number of Column Addresses on
Assembly
10, 11
0A
0A
0B
5
6
7
8
9
2
72
0
02
48
00
04
50
02
48
00
04
50
02
48
00
04
50
Number of Physical Ranks on DIMM
Module Data Width
Module Data Width (Continued)
Module Voltage Interface Levels
SDRAM Cycle Time, tCK
CAS Latency = 3
SSTL 2.5V
5ns (-40B)
t
10
0.7ns (-40B)
70
70
70
SDRAM Access from Clock, AC
CAS Latency = 3
11
12
ECC
02
80
08
02
82
08
02
82
08
Module Configuration Type
Refresh Rate/Type
15.62µs, 7.8µs/SELF
8
13 SDRAM Device Width (Primary DDR
SDRAM)
14
8
08
01
08
01
08
01
Error-checking DDR SDRAM Data
Width
15
1 clock
Minimum Clock Delay, Back-to-Back
Random Column Access
16 Burst Lengths Supported
2, 4, 8
4
0E
04
0E
04
0E
04
17
Number of Banks on DDR SDRAM
Device
18 CAS Latencies Supported
3, 2.5, 2
0
1C
01
02
20
1C
01
02
20
1C
01
02
20
19
20
CS Latency
WE Latency
1
21 SDRAM Module Attributes
Unbuffered/Diff.
Clock
22
23
Fast/Concurrent AP
6ns (for PC2700
system compatibility)
C0
60
C0
60
C0
60
SDRAM Device Attributes: General
SDRAM Cycle Time, tCK
(CAS Latency = 2.5)
t
24
25
0.7ns (for PC 2700
system compatibility)
70
75
70
75
70
75
SDRAM Access from CK, AC
(CAS Latency = 2.5)
SDRAM Cycle Time, tCK
(CAS Latency = 2)
7.5ns (for PC 2100
and PC 1600 system
compatibility)
t
26
0.75ns (for PC 2100
and PC 1600 system
compatibility)
75
75
75
SDRAM Access from CK, AC
(CAS LATENCY = 2)
t
27
28
15ns (-40B)
3C
28
3C
28
3C
28
Minimum Row Precharge Time, RP
10ns (-40B)
Minimum Row Active to Row Active,
tRRD
t
29
30
15ns (-40B)
40ns (-40B)
3C
28
3C
28
3C
28
Minimum RAS# to CAS# Delay, RCD
t
Minimum RAS# Pulse Width, RAS
pdf: 09005aef80814e61, source: 09005aef80a43eed
DDA18C32_64_128x72AG.fm - Rev. E 9/04 EN
Micron Technology, Inc., reserves the right to change products or specifications without notice.
©2004 Micron Technology, Inc.
27
MICRON [ MICRON TECHNOLOGY ]
