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EBD21RD4ABNA Datasheet(PDF) 5 Page - Elpida Memory

Part # EBD21RD4ABNA
Description  2GB Registered DDR SDRAM DIMM
Download  19 Pages
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Manufacturer  ELPIDA [Elpida Memory]
Direct Link  http://www.elpida.com/en
Logo ELPIDA - Elpida Memory

EBD21RD4ABNA Datasheet(HTML) 5 Page - Elpida Memory

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EBD21RD4ABNA
Preliminary Data Sheet E0273E20 (Ver. 2.0)
5
Serial PD Matrix*
1
Byte No.
Function described
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
Hex value
Comments
0
Number of bytes utilized by module
manufacturer
1
0
0
0
0
0
0
0
80H
128
1
Total number of bytes in serial PD
device
0
0
0
0
1
0
0
0
08H
256 byte
2
Memory type
0
0
0
0
0
1
1
1
07H
SDRAM DDR
3
Number of row address
0
0
0
0
1
1
0
1
0DH
13
4
Number of column address
0
0
0
0
1
1
0
0
0CH
12
5
Number of DIMM banks
0
0
0
0
0
0
1
0
02H
2
6
Module data width
0
1
0
0
1
0
0
0
48H
72 bits
7
Module data width continuation
0
0
0
0
0
0
0
0
00H
0 (+)
8
Voltage interface level of this assembly 0
0
0
0
0
1
0
0
04H
SSTL 2.5V
9
DDR SDRAM cycle time, CL = X
-7A, -7B
0
1
1
1
0
1
0
1
75H
CL = 2.5*
3
-10
1
0
1
0
0
0
0
0
A0H
10
SDRAM access from clock (tAC)
-7A, -7B
0
1
1
1
0
1
0
1
75H
0.75ns*
3
-10
1
0
0
0
0
0
0
0
80H
0.8ns*
3
11
DIMM configuration type
0
0
0
0
0
0
1
0
02H
ECC
12
Refresh rate/type
1
0
0
0
0
0
1
0
82H
7.8 µs
Self refresh
13
Primary SDRAM width
0
0
0
0
0
1
0
0
04H
× 4
14
Error checking SDRAM width
0
0
0
0
0
1
0
0
04H
× 4
15
SDRAM device attributes:
Minimum clock delay back-to-back
column access
0
0
0
0
0
0
0
1
01H
1 CLK
16
SDRAM device attributes:
Burst length supported
0
0
0
0
1
1
1
0
0EH
2, 4, 8
17
SDRAM device attributes: Number of
banks on SDRAM device
0
0
0
0
0
1
0
0
04H
4
18
SDRAM device attributes:
/CAS latency
0
0
0
0
1
1
0
0
0CH
2, 2.5
19
SDRAM device attributes:
/CS latency
0
0
0
0
0
0
0
1
01H
0
20
SDRAM device attributes:
/WE latency
0
0
0
0
0
0
1
0
02H
1
21
SDRAM module attributes
0
0
1
0
0
1
1
0
26H
Registered
22
SDRAM device attributes: General
1
1
0
0
0
0
0
0
C0H
± 0.2V
23
Minimum clock cycle time at CLX - 0.5
-7A
0
1
1
1
0
1
0
1
75H
CL = 2*
3
-7B, -10
1
0
1
0
0
0
0
0
A0H
24
Maximum data access time (tAC) from
clock at CLX - 0.5
-7A, -7B
0
1
1
1
0
1
0
1
75H
0.75ns*
3
-10
1
0
0
0
0
0
0
0
80H
0.8ns*
3
25
Minimum clock cycle time at CLX - 1
0
0
0
0
0
0
0
0
00H
26
Maximum data access time (tAC) from
clock at CLX - 1
0
0
0
0
0
0
0
0
00H
27
Minimum row precharge time (tRP)
0
1
0
1
0
0
0
0
50H
20ns
28
Minimum row active to row active
delay (tRRD)
0
0
1
1
1
1
0
0
3CH
15ns
29
Minimum /RAS to /CAS delay (tRCD)
0
1
0
1
0
0
0
0
50H
20ns


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