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EBE21RD4ABHA Datasheet(PDF) 6 Page - Elpida Memory

Part No. EBE21RD4ABHA
Description  2GB Registered DDR2 SDRAM DIMM (256M words x 72 bits, 2 Ranks)
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Manufacturer  ELPIDA [Elpida Memory]
Direct Link  http://www.elpida.com/en
Logo ELPIDA - Elpida Memory

EBE21RD4ABHA Datasheet(HTML) 6 Page - Elpida Memory

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EBE21RD4ABHA
Data Sheet E0451E20 (Ver. 2.0)
6
Byte No.
Function described
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
Hex value
Comments
31
Module rank density
0
0
0
0
0
0
0
1
01H
1GB
32
Address and command setup time
before clock (tIS)
-5C
0
0
1
0
0
1
0
1
25H
0.25ns*
1
-4A
0
0
1
1
0
1
0
1
35H
0.35ns*
1
33
Address and command hold time after
clock (tIH)
-5C
0
0
1
1
1
0
0
0
38H
0.38ns*
1
-4A
0
1
0
0
1
0
0
0
48H
0.48ns*
1
34
Data input setup time before clock
(tDS)
-5C
0
0
0
1
0
0
0
0
10H
0.10ns*
1
-4A
0
0
0
1
0
1
0
1
15H
0.15ns*
1
35
Data input hold time after clock (tDH)
-5C
0
0
1
0
0
0
1
1
23H
0.23ns*
1
-4A
0
0
1
0
1
0
0
0
28H
0.28ns*
1
36
Write recovery time (tWR)
0
0
1
1
1
1
0
0
3CH
15ns*
1
37
Internal write to read command delay
(tWTR)
-5C
0
0
0
1
1
1
1
0
1EH
7.5ns*
1
-4A
0
0
1
0
1
0
0
0
28H
10ns*
1
38
Internal read to precharge command
delay (tRTP)
0
0
0
1
1
1
1
0
1EH
7.5ns*
1
39
Memory analysis probe characteristics 0
0
0
0
0
0
0
0
00H
TBD
40
Extension of Byte 41 and 42
0
0
0
0
0
0
0
0
00H
Undefined
41
Active command period (tRC)
0
0
1
1
1
1
0
0
3CH
60ns*
1
42
Auto refresh to active/
Auto refresh command cycle (tRFC)
0
1
1
0
1
0
0
1
69H
105ns*
1
43
SDRAM tCK cycle max. (tCK max.)
1
0
0
0
0
0
0
0
80H
8ns*
1
44
Dout to DQS skew
-5C
0
0
0
1
1
1
1
0
1EH
0.30ns*
1
-4A
0
0
1
0
0
0
1
1
23H
0.35ns*
1
45
Data hold skew (tQHS)
-5C
0
0
1
0
1
0
0
0
28H
0.40ns*
1
-4A
0
0
1
0
1
1
0
1
2DH
0.45ns*
1
46
PLL relock time
0
0
0
0
1
1
1
1
0FH
15
µs
47 to 61
0
0
0
0
0
0
0
0
00H
62
SPD Revision
0
0
0
1
0
0
0
0
10H
Rev. 1.0
63
Checksum for bytes 0 to 62
-5C
1
0
0
0
1
1
0
0
8CH
-4A
0
0
0
1
0
0
0
0
10H
64 to 65
Manufacturer’s JEDEC ID code
0
1
1
1
1
1
1
1
7FH
Continuation
code
66
Manufacturer’s JEDEC ID code
1
1
1
1
1
1
1
0
FEH
Elpida Memory
67 to 71
Manufacturer’s JEDEC ID code
0
0
0
0
0
0
0
0
00H
72
Manufacturing location
×
×
×
×
×
×
×
×
××
(ASCII-8bit
code)


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