HB54A5128FN-A75B Datasheet, PDF (5/17 Pages) Elpida Memory – 512MB Unbuffered DDR SDRAM DIMM

HB54A5128FN, HB54A5129FN-A75B/B75B/10B
Serial PD Matrix*¹
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
80
1
Total number of bytes in serial PD
device
0 0 0 0 1 0 0 0 08
128
256 byte
2
Memory type
0 0 0 0 0 1 1 1 07
3
Number of row address
0 0 0 0 1 1 0 1 0D
4
Number of column address
0 0 0 0 1 0 1 0 0A
5
Number of DIMM banks
6
Module data width
HB54A5128FN
E _HB54A5129FN
0 0 0 0 0 0 1 0 02
0 1 0 0 0 0 0 0 40
0 1 0 0 1 0 0 0 48
7
Module data width continuation
0 0 0 0 0 0 0 0 00
8
Voltage interface level of this assembly 0 0 0 0 0 1 0 0 04
O₉
DDR SDRAM cycle time, CL = X
-A75B
0 1 1 1 0 0 0 0 70
-B75B
0 1 1 1 0 1 0 1 75
-10B
1 0 0 0 0 0 0 0 80
L ¹⁰
SDRAM access from clock (tAC)
-A75B/B75B
0 1 1 1 0 1 0 1 75
-10B
1 0 0 0 0 0 0 0 80
11
DIMM configuration type
HB54A5128FN
0 0 0 0 0 0 0 0 00
HB54A5129FN
0 0 0 0 0 0 1 0 02
12
Refresh rate/type
1 0 0 0 0 0 1 0 82
P ₁₃
Primary SDRAM width
0 0 0 0 1 0 0 0 08
14
Error checking SDRAM width
HB54A5128FN
0 0 0 0 0 0 0 0 00
r ^HB54A5129FN
0 0 0 0 1 0 0 0 08
SDRAM device attributes:
15
Minimum clock delay back-to-back 0 0 0 0 0 0 0 1 01
o column access
16
SDRAM device attributes:
Burst length supported
0 0 0 0 1 1 1 0 0E
17
SDRAM device attributes: Number of
banks on SDRAM device
0
0
0
0
0
1
0
0
04
d ₁₈
SDRAM device attributes:
/CAS latency
19
SDRAM device attributes:
/CS latency
u ₂₀
SDRAM device attributes:
/WE latency
0 0 0 0 1 1 0 0 0C
0 0 0 0 0 0 0 1 01
0 0 0 0 0 0 1 0 02
21
SDRAM module attributes
0 0 1 0 0 0 0 0 20
22
SDRAM device attributes: General 1 1 0 0 0 0 0 0 C0
c _{Minimum clock cycle time at}
23
CLX - 0.5
t ^-A75B
0 1 1 1 0 1 0 1 75
SDRAM DDR
13
10
2
64 bits
72 bits
0 (+)
SSTL 2.5V
CL = 2.5*⁵
0.75ns*⁵
0.8ns*⁵
None
ECC
7.8 µs
Self refresh
×8

×8
1 CLK
2, 4, 8
4
2, 2.5
0
1
Unbuffered
± 0.2V
CL = 2*⁵
-B75B/10B
1 0 1 0 0 0 0 0 A0
Maximum data access time (tAC) from
24
clock at CLX - 0.5
0 1 1 1 0 1 0 1 75
-A75B/B75B
-10B
1 0 0 0 0 0 0 0 80
0.75ns*⁵
0.8ns*⁵
Data Sheet E0087H40 (Ver. 4.0)
5