EBE21UE8ACSA Datasheet, PDF (5/27 Pages) Elpida Memory – 2GB DDR2 SDRAM SO-DIMM

EBE21UE8ACSA
Serial PD Matrix
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 bytes
1
Total number of bytes in serial PD
device
0 0 0 0 1 0 0 0 08H
256 bytes
2
Memory type
0 0 0 0 1 0 0 0 08H
DDR2 SDRAM
3
Number of row address
0 0 0 0 1 1 1 0 0EH
14
4
Number of column address
0 0 0 0 1 0 1 0 0AH
10
5
Number of DIMM ranks
0 1 1 0 0 0 0 1 61H
2
6
Module data width
0 1 0 0 0 0 0 0 40H
64
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 1 05H
SSTL 1.8V
9
DDR SDRAM cycle time, CL = X
-8E (CL = 5)
0 0 1 0 0 1 0 1 25H
2.5ns*¹
-8G (CL = 6)
0 0 1 0 0 1 0 1 25H
2.5ns*¹
-6E (CL = 5)
0 0 1 1 0 0 0 0 30H
3.0ns*¹
10
SDRAM access from clock (tAC)
-8E, -8G
0 1 0 0 0 0 0 0 40H
0.4ns*¹
-6E
0 1 0 0 0 1 0 1 45H
0.45ns*¹
11
DIMM configuration type
0 0 0 0 0 0 0 0 00H
None
12
Refresh rate/type
1 0 0 0 0 0 1 0 82H
7.8µs
13
Primary SDRAM width
0 0 0 0 1 0 0 0 08H
×8
14
Error checking SDRAM width
0 0 0 0 0 0 0 0 00H
None
15
Reserved
0 0 0 0 0 0 0 0 00H
0
16
SDRAM device attributes:
Burst length supported
0 0 0 0 1 1 0 0 0CH
4,8
17
SDRAM device attributes: Number of
banks on SDRAM device
0
0
0
0
1
0
0
0
08H
8
SDRAM device attributes: /CAS
18
latency
0 0 1 1 1 0 0 0 38H
3, 4, 5
-8E, -6E
-8G
0 1 1 1 0 0 0 0 70H
4, 5, 6
19
DIMM Mechanical Characteristics
0 0 0 0 0 0 0 1 01H
3.80mm max.
20
DIMM type information
0 0 0 0 0 1 0 0 04H
SO-DIMM
21
SDRAM module attributes
0 0 0 0 0 0 0 0 00H
Normal
22
SDRAM device attributes: General 0 0 0 0 0 0 1 1 03H
Weak Driver
50Ω ODT Support
Minimum clock cycle time at
23
CL = X − 1
0 0 1 1 1 1 0 1 3DH
3.75ns*¹
-8E, -6E (CL = 4)
-8G (CL = 5)
0 0 1 1 0 0 0 0 30H
3.0ns*¹
Maximum data access time (tAC) from
24
clock at CL = X − 1
0 1 0 1 0 0 0 0 50H
0.5ns*¹
-8E, -6E (CL = 4)
-8G (CL = 5)
0 1 0 0 0 1 0 1 45H
0.45ns*¹
Minimum clock cycle time at
25
CL = X − 2
-8E, -6E (CL = 3)
-8G (CL = 4)
0 1 0 1 0 0 0 0 50H
0 0 1 1 1 1 0 1 3DH
5.0ns*¹
3.75ns*¹
Data Sheet E1047E30 (Ver. 3.0)
5