WED3DG64128V-D1
1
White Electronic Designs Corporation (602) 437-1520 www.whiteedc.com
White Electronic Designs
June 2003
Rev. 1
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
1GB- 128Mx64 SDRAM, UNBUFFERED W/PLL
n
PC100 and PC133 compatible
n
Burst Mode Operation
n
Auto and Self Refresh capability
n
LVTTL compatible inputs and outputs
n
Serial Presence Detect with EEPROM
n
Fully synchronous: All signals are registered on the positive
edge of the system clock
n
Programmable Burst Lengths: 1, 2, 4, 8 or Full Page
n
3.3V ± 0.3V Power Supply
n
144 Pin SO-DIMM JEDEC
The WED3DG64128V is a 128Mx64 synchronous DRAM
module which consists of eight 128Mx8 stack SDRAM
components in TSOP II package, and one 2Kb EEPROM
in an 8 pin TSSOP package for Serial Presence Detect
which are mounted on a 144 pin SO-DIMM multilayer
FR4 Substrate.
*This product is subject to change without notice.
DESCRIPTION
FEATURES
A0 – A12
Address Input (Multiplexed)
BA0-1
Select Bank
DQ0-63
Data Input/Output
CK0
Clock Input
CKE0, CKE1 Clock Enable Input
CS0#, CS1# Chip Select Input
RAS#
Row Address Strobe
CAS#
Column Address Strobe
WE#
Write Enable
DQM0-7
DQM
VCC
Power Supply (3.3V)
VSS
Ground
SDA
Serial Data I/O
SCL
Serial Clock
DNU
Do Not Use
NC
No Connect
PIN CONFIGURATIONS (FRONT SIDE/BACK SIDE)
PIN NAMES
PINOUT
PIN
FRONT
PIN
BACK
PIN
FRONT
PIN
BACK
PIN
BACK
PIN
BACK
1
VSS
2
VSS
49
DQ13
50
DQ45
97
DQ22
98
DQ54
3
DQ0
4
DQ32
51
DQ14
52
DQ46
99
DQ23
100
DQ55
5
DQ1
6
DQ33
53
DQ15
54
DQ47
101
VCC
102
VCC
7
DQ2
8
DQ34
55
VSS
56
VSS
103
A6
104
A7
9
DQ3
10
DQ35
57
NC
58
NC
105
A8
106
BA0
11
VCC
12
VCC
59
NC
60
NC
107
VSS
108
VSS
13
DQ4
14
DQ36
61
CK0
62
CKE0
109
A9
110
BA1
15
DQ5
16
DQ37
63
VCC
64
VCC
111
A10
112
A11
17
DQ6
18
DQ38
65
RAS#
66
CAS#
113
VCC
114
VCC
19
DQ7
20
DQ39
67
WE#
68
CKE1
115
DQMB2
116
DQMB6
21
VSS
22
VSS
69
CS0#
70
A12
117
DQMB3
118
DQMB7
23
DQM0
24
DQM4
71
CS1#
72
NC
119
VSS
120
VSS
25
DQM1
26
DQM5
73
NC
74
NC
121
DQ24
122
DQ56
27
VCC
28
VCC
75
VSS
76
VSS
123
DQ25
124
DQ57
29
A0
30
A3
77
NC
78
NC
125
DQ26
126
DQ58
31
A1
32
A4
79
NC
80
NC
127
DQ27
128
DQ59
33
A2
34
A5
81
VCC
82
VCC
129
VCC
130
VCC
35
VSS
36
VSS
83
DQ16
84
DQ48
131
DQ28
132
DQ60
37
DQ8
38
DQ40
85
DQ17
86
DQ49
133
DQ29
134
DQ61
39
DQ9
40
DQ41
87
DQ18
88
DQ50
135
DQ30
136
DQ62
41
DQ10
42
DQ42
89
DQ19
90
DQ51
137
DQ31
138
DQ63
43
DQ11
44
DQ43
91
VSS
92
VSS
139
VSS
140
VSS
45
VCC
46
VCC
93
DQ20
94
DQ52
141
SDA
142
SCL
47
DQ12
48
DQ44
95
DQ21
96
DQ53
143
VCC
144
VCC
** These pins should be NC in the system which
does not support SPD.