WED3DG6432V-D1
White Electronic Designs
256MB- 32Mx64 SDRAM UNBUFFERED
FEATURES
DESCRIPTION
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Burst Mode Operation
Auto and Self Refresh capability
LVTTL compatible inputs and outputs
Serial Presence Detect with EEPROM
Fully synchronous: All signals are registered on the positive
edge of the system clock
The WED3DG6432V is a 32Mx64 synchronous DRAM
module which consists of eight 16Mx16 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.
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Programmable Burst Lengths: 1, 2, 4, 8 or Full Page
3.3V 0.3V Power Supply
144 Pin SO-DIMM JEDEC
* This product is subject to change without notice.
PIN CONFIGURATIONS (FRONT SIDE/BACK SIDE)
PIN NAMES
PINOUT
PIN FRONT PIN
A0 – A12
BA0-1
Address Input (Multiplexed)
Select Bank
PIN FRONT PIN
BACK
VSS
BACK
DQ46
DQ47
VSS
NC
NC
PIN
95
97
BACK
DQ21
DQ22
DQ23
VCC
A6
A8
VSS
A9
PIN
96
98
100
102
104
106
108
110
BACK
DQ53
DQ54
DQ55
VCC
A7
BA0
VSS
BA1
1
3
5
7
VSS
DQ0
DQ1
DQ2
DQ3
VCC
2
4
6
8
51
53
55
57
59
DQ14
DQ15
VSS
NC
NC
52
54
56
58
60
DQ0-63
CK0,CK1
Data Input/Output
Clock Input
DQ32
DQ33
DQ34
DQ35
VCC
DQ36
DQ37
DQ38
DQ39
VSS
DQM4
DQM5
VCC
A3
A4
99
101
103
105
107
109
CKE0,CKE1 Clock Enable Input
CS0#,CS1# Chip Select Input
9
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
41
43
45
47
49
RAS#
CAS#
WE#
DQM0-7
VCC
Row Address Strobe
Column Address Strobe
Write Enable
DQM
DQ4
DQ5
DQ6
DQ7
VSS
DQM0
DQM1
VCC
A0
A1
A2
VSS
DQ8
DQ9
DQ10
DQ11
VCC
VOLTAGE KEY
61
63
65
67
69
71
73
75
77
79
81
83
85
87
89
91
93
CK0
VCC
62
64
66
68
70
72
74
76
78
80
82
84
86
88
90
92
94
CKE0
VCC
CAS#
CKE1
A12
*A13
CK1
VSS
NC
NC
VCC
DQ48
DQ49
DQ50
DQ51
VSS
111 A10/AP 112
A11
VCC
113
115
117
119
121
123
125
127
129
131
133
135
137
139
141
143
VCC
DQM2
DQM3
VSS
DQ24
DQ25
DQ26
DQ27
VCC
DQ28
DQ29
DQ30
DQ31
VSS
114
116
118
120
122
124
126
128
130
132
134
136
138
140
142
144
RAS#
WE#
CS0#
CS1#
DNU
VSS
NC
NC
VCC
DQ16
DQ17
DQ18
DQ19
VSS
DQM6
DQM7
VSS
DQ56
DQ57
DQ58
DQ59
VCC
DQ60
DQ61
DQ62
DQ63
VSS
Power Supply (3.3V)
Ground
VSS
SDA
SCL
Serial Data I/O
Serial Clock
DNU
NC
Do Not Use
A5
VSS
No Connect
*
These pins are not used in this module.
** These pins should be NC in the system which
does not support SPD.
DQ40
DQ41
DQ42
DQ43
VCC
DQ12
DQ13
DQ44
DQ45
**SDA
VCC
**SCL
VCC
DQ20
DQ52
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
Sept. 2002
Rev. 0
1
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com