EBJ21UE8BDS1
Hex
Byte No. Function described
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 value Comments
SDRAM minimum internal read to
precharge command delay (tRTP)
27
28
0
0
1
1
1
1
0
0
3CH 7.5ns
Upper nibble for tFAW
-DJ
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
00H
01H
30.0ns
37.5ns
-AE
0
1
Minimum four activate window delay time
(tFAW)
-DJ
29
1
1
1
0
0
0
0
F0H
30.0ns
-AE
0
1
0
0
1
0
0
0
1
0
1
0
0
1
0
1
2CH 37.5ns
30
31
SDRAM output drivers supported
83H
81H
DLL-off/RZQ/6, 7
PASR/2X refresh rate
at +85C° to +95C°
SDRAM refresh options
1
0
0
0
0
0
0
1
32
33
Module thermal sensor
SDRAM device type
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
1
0
0
0
0
1
0
0
0
0
0
1
0
1
0
0
0
1
0
0
0
0
0
1
1
1
00H
00H
00H
0FH
11H
25H
Not Incorporated
Standard
34 to 59 Reserved
—
60
61
62
Module nominal height
29 < height ≤ 30mm
Module maximum thickness
Reference raw card used
Raw Card F1
Standard
Address mapping from edge connecter to
DRAM
63
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
1
1
0
0
0
0
00H
00H
02H
64 to
116
Module specific section
—
Module ID: manufacturer’s JEDEC ID
code, LSB
117
118
Elpida Memory
Module ID: manufacturer’s JEDEC ID
code, MSB
FEH Elpida Memory
119
120
121
Module ID: manufacturing location
Module ID: manufacturing date
Module ID: manufacturing date
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
×
××
××
××
Year code (BCD)
Week code (BCD)
122 to
125
Module ID: module serial number
×
×
×
×
×
×
×
×
××
Cyclical redundancy code (CRC)
-DJ
126
0
0
0
0
1
1
0
0
1
1
1
1
0
0
1
1
1
1
0
1
1
1
1
0
15H
57H
7EH
-AE
Cyclical redundancy code (CRC)
-DJ
127
-AE
1
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
1
1
0
1
1
1
0
0
0
0
1
1
0
0
1
0
0
0
1
0
0
0
1
1
1
0
1
0
0
1
0
0
0
1
0
0
0
0
1
0
0
0
1
1
0
0
0
0
1
1
0
0
1
0
1
0
1
1
1
0
0
0
0
1
0
1
1
1
0
0
0
1
1
1
0
0
0
1
D7H
45H
42H
4AH
32H
31H
55H
45H
38H
42H
44H
53H
128
129
130
131
132
133
134
135
136
137
138
Module part number
Module part number
Module part number
Module part number
Module part number
Module part number
Module part number
Module part number
Module part number
Module part number
Module part number
E
B
J
2
1
U
E
8
B
D
S
Data Sheet E1623E20 (Ver. 2.0)
7
ELPIDA [ ELPIDA MEMORY ]
