EBE25UD6ABFA
Byte No. Function described
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Hex value
Comments
15ns
27
28
29
30
31
Minimum row precharge time (tRP)
Minimum row active to row active
delay (tRRD)
Minimum /RAS to /CAS delay (tRCD)
Minimum active to precharge time
(tRAS)
0
0
0
0
0
0
0
0
0
1
1
1
1
1
0
1
0
1
0
0
1
1
1
1
0
1
0
1
0
0
0
0
0
0
0
0
0
0
0
0
3CH
28H
3CH
28H
40H
10ns
15ns
40ns
Module rank density
256M bytes
Address and command setup time
32
before clock (tIS)
-5C
0
0
0
0
0
0
0
0
1
0
1
1
1
0
0
0
1
1
0
1
0
0
1
1
0
1
1
0
0
0
0
0
0
0
0
1
1
0
0
0
25H
35H
38H
48H
10H
0.25ns*1
0.35ns*1
0.38ns*1
0.48ns*1
0.10ns*1
-4A
Address and command hold time after
clock (tIH)
-5C
33
-4A
Data input setup time before clock
(tDS)
-5C
34
35
-4A
0
0
0
0
0
1
1
0
0
0
1
0
0
1
1
1
15H
23H
0.15ns*1
0.23ns*1
Data input hold time after clock (tDH)
-5C
-4A
0
0
0
0
1
1
0
1
1
1
0
1
0
0
0
0
28H
3CH
0.28ns*1
15ns*1
36
37
Write recovery time (tWR)
Internal write to read command delay
(tWTR)
-5C
0
0
0
1
1
1
1
0
1EH
7.5ns*1
-4A
0
0
0
0
1
0
0
1
1
1
0
1
0
1
0
0
28H
1EH
10ns*1
7.5ns*1
Internal read to precharge command
delay (tRTP)
38
39
40
41
Memory analysis probe characteristics 0
0
0
0
0
0
1
0
0
1
0
0
0
0
0
1
0
0
1
0
0
1
00H
00H
37H
TBD
Extension of Byte 41 and 42
0
0
Undefined
55ns*1
Active command period (tRC)
Auto refresh to active/
42
43
44
0
1
0
0
0
1
0
0
0
0
1
0
0
1
1
0
0
1
0
0
1
0
1
0
1
0
0
1
0
0
0
0
1
1
0
1
0
0
1
0
69H
80H
1EH
23H
28H
105ns*1
8ns*1
Auto refresh command cycle (tRFC)
SDRAM tCK cycle max. (tCK max.)
Dout to DQS skew
-5C
0.30ns*1
0.35ns*1
0.40ns*1
-4A
Data hold skew (tQHS)
-5C
-4A
45
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
1
1
0
0
0
1
0
0
0
0
0
0
0
1
0
0
0
2DH
00H
00H
10H
0.45ns*1
46
PLL relock time
Undefined
47 to 61
62
SPD Revision
Rev. 1.0
Checksum for bytes 0 to 62
-5C
-4A
63
0
1
0
1
1
1
1
1
1
1
1
1
1
1
1
0
1
1
0
0
1
1
1
1
79H
FDH
7FH
Continuation
code
64 to 65
Manufacturer’s JEDEC ID code
66
Manufacturer’s JEDEC ID code
Manufacturer’s JEDEC ID code
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
0
FEH
00H
Elpida Memory
67 to 71
Preliminary Data Sheet E0534E11 (Ver. 1.1)
6
ELPIDA [ ELPIDA MEMORY ]
