EBD25RB4ALFA
Serial PD Matrix
Byte No. Function described
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Hex value
Comments
128 bytes
Number of bytes utilized by module
0
1
1
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
80H
08H
manufacturer
Total number of bytes in serial PD
device
256 bytes
2
3
4
5
6
7
8
Memory type
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
1
0
0
1
1
0
0
0
0
1
1
0
1
0
0
0
0
1
0
1
1
0
0
0
07H
0CH
0BH
01H
48H
00H
04H
DDR SDRAM
Number of row address
Number of column address
Number of DIMM banks
Module data width
12
11
1
72 bits
0
Module data width continuation
Voltage interface level of this assembly 0
SSTL 2
DDR SDRAM cycle time, CL = 2.5
(-7A)
9
0
1
1
1
0
1
0
1
75H
7.5ns
(-75)
(-1A)
0
1
1
0
1
1
1
0
0
0
1
0
0
0
1
0
75H
A0H
7.5ns
10ns
SDRAM access from clock (tAC)
(-7A)
10
0
1
1
1
0
1
0
1
75H
0.75ns
(-75)
0
1
0
1
0
0
1
0
0
0
0
0
1
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
1
1
0
0
1
0
0
0
1
0
0
0
0
0
75H
80H
02H
80H
04H
04H
0.75ns
0.8ns
ECC
Norm
× 4
(-1A)
11
12
13
14
DIMM configuration type
Refresh rate/type
Primary SDRAM width
Error checking SDRAM width
× 4
SDRAM device attributes:
Minimum clock delay back-to-back
column access
15
0
0
0
0
0
0
0
1
01H
1 CLK
SDRAM device attributes:
Burst length supported
16
17
18
19
20
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
0
0
1
0
0
0
1
0
0EH
04H
0CH
01H
02H
2, 4, 8
SDRAM device attributes: Number of
banks on SDRAM device
4
SDRAM device attributes:
/CAS latency
2, 2.5
SDRAM device attributes:
/CS latency
SDRAM device attributes:
/WE latency
0
1
21
22
SDRAM module attributes
0
0
0
0
1
0
0
0
0
0
1
0
1
0
0
0
26H
00H
Reg+PLLdifclk
VDD 0.2V
SDRAM device attributes: General
Minimum clock cycle time at CL = 2
(-7A)
23
0
1
1
1
0
1
0
1
75H
7.5ns
(-75)
(-1A)
1
1
0
0
1
1
0
0
0
0
0
0
0
0
0
0
A0H
A0H
10ns
10ns
Maximum data access time (tAC) from
24
clock at CL = 2
(-7A)
0
1
1
1
0
1
0
1
75H
0.75ns
(-75)
(-1A)
0
1
0
1
0
0
1
0
0
1
0
0
0
0
0
1
0
0
0
0
0
1
0
0
75H
80H
00H
0.75ns
0.8ns
25 to 26
Preliminary Data Sheet E0211E11 (Ver. 1.1)
5
ELPIDA [ ELPIDA MEMORY ]
