參數(shù)資料
型號: EBE21RD4AGFA-6E-E
廠商: ELPIDA MEMORY INC
元件分類: DRAM
英文描述: 2GB Registered DDR2 SDRAM DIMM (256M words x 72 bits, 2 Ranks)
中文描述: 256M X 72 DDR DRAM MODULE, 0.45 ns, DMA240
封裝: ROHS COMPLIANT, DIMM-240
文件頁數(shù): 6/22頁
文件大小: 173K
代理商: EBE21RD4AGFA-6E-E
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
Address and command setup time
before clock (tIS)
-5C
-4A
Address and command hold time after
clock (tIH)
-5C
-4A
Data input setup time before clock
(tDS)
-5C
-4A
Data input hold time after clock (tDH)
-5C
-4A
0
0
0
0
0
0
0
1
01H
1GB
32
0
0
1
0
0
1
0
1
25H
0.25ns*
1
0
0
1
1
0
1
0
1
35H
0.35ns*
1
33
0
0
1
1
1
0
0
0
38H
0.38ns*
1
0
1
0
0
1
0
0
0
48H
0.48ns*
1
34
0
0
0
1
0
0
0
0
10H
0.10ns*
1
0
0
0
1
0
1
0
1
15H
0.15ns*
1
35
0
0
1
0
0
0
1
1
23H
0.23ns*
1
0
0
1
0
1
0
0
0
28H
0.28ns*
1
36
Write recovery time (tWR)
Internal write to read command delay
(tWTR)
-5C
-4A
Internal read to precharge command
delay (tRTP)
Memory analysis probe characteristics 0
0
0
1
1
1
1
0
0
3CH
15ns*
1
37
0
0
0
1
1
1
1
0
1EH
7.5ns*
1
0
0
1
0
1
0
0
0
28H
10ns*
1
38
0
0
0
1
1
1
1
0
1EH
7.5ns*
1
39
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)
Auto refresh to active/
Auto refresh command cycle (tRFC)
SDRAM tCK cycle max. (tCK max.)
Dout to DQS skew
-5C
-4A
Data hold skew (tQHS)
-5C
-4A
0
0
1
1
1
1
0
0
3CH
60ns*
1
42
0
1
1
0
1
0
0
1
69H
105ns*
1
43
1
0
0
0
0
0
0
0
80H
8ns*
1
44
0
0
0
1
1
1
1
0
1EH
0.30ns*
1
0
0
1
0
0
0
1
1
23H
0.35ns*
1
45
0
0
1
0
1
0
0
0
28H
0.40ns*
1
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
μ
s
47 to 61
0
0
0
0
0
0
0
0
00H
62
SPD Revision
Checksum for bytes 0 to 62
-5C
-4A
0
0
0
1
0
0
0
0
10H
Rev. 1.0
63
1
0
0
0
1
1
0
0
8CH
0
0
0
1
0
0
0
0
10H
Continuation
code
Elpida Memory
64 to 65
Manufacturer’s JEDEC ID code
0
1
1
1
1
1
1
1
7FH
66
Manufacturer’s JEDEC ID code
1
1
1
1
1
1
1
0
FEH
67 to 71
Manufacturer’s JEDEC ID code
0
0
0
0
0
0
0
0
00H
(ASCII-8bit
code)
72
Manufacturing location
×
×
×
×
×
×
×
×
××
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