EBJ21UE8BAU0
Hex
Byte No. Function described
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 value Comments
21
SDRAM upper nibbles for tRAS and tRC
0
0
0
1
0
0
0
0
0
1
1
0
1
0
0
0
0
0
1
1
0
0
1
1
0
0
0
0
1
0
0
0
11H
SDRAM minimum active to precharge time
(tRAS), LSB
-DJ
22
20H
36ns
-AE, -8C
2CH 37.5ns
8CH 49.5ns
SDRAM minimum active to active /auto-
refresh time (tRC), LSB
-DJ
23
-AE
-8C
1
1
0
0
0
1
1
0
0
0
1
1
0
0
1
0
95H
50.625ns
A4H 52.5ns
SDRAM minimum refresh recovery time
delay (tRFC), LSB
24
25
26
27
28
0
0
0
0
1
0
0
0
1
0
1
1
1
0
1
1
0
0
1
1
0
0
1
1
0
1
0
0
0
1
0
0
70H
03H
110ns
110ns
SDRAM minimum refresh recovery time
delay (tRFC), MSB
SDRAM minimum internal write to read
command delay (tWTR)
3CH 7.5ns
3CH 7.5ns
SDRAM minimum internal read to
precharge command delay (tRTP)
Upper nibble for tFAW
-DJ
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
00H
01H
-AE, -8C
Minimum four activate window delay time
29
(tFAW)
-DJ
1
1
1
1
0
0
0
0
F0H
30ns
-AE
0
0
1
0
1
0
1
0
0
0
0
0
1
0
0
1
0
0
0
0
1
0
0
1
2CH 37.5ns
-8C
40H
83H
40ns
30
31
SDRAM output drivers supported
DLL-off / RZQ/6, 7
PASR / 2X refresh
rate at +85°C to
+95°C
SDRAM refresh options
1
0
0
0
0
0
0
1
81H
32
33
Module thermal sensor
SDRAM device type
1
0
0
0
0
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
0
1
0
1
0
0
0
1
0
0
0
0
0
1
1
1
00H
00H
00H
0FH
11H
05H
Not Incorparated
Standard
34 to 59 Reserved
—
60
61
62
Module nominal height
29 < height ≤ 30mm
Module maximum thickness
Reference raw card used
Raw Card F
Standard
Address mapping from edge connecter to
DRAM
63
0
0
0
1
0
0
0
1
0
0
0
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
1
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
×
×
×
×
×
×
×
×
××
Data Sheet E1244E40 (Ver. 4.0)
7
ELPIDA [ ELPIDA MEMORY ]
