T
T
T
S
S
S
3
3
3
2
2
2
M
M
M
L
L
L
S
S
S
6
6
6
4
4
4
V
V
V
6
6
6
F
F
F
168PIN PC133 Unbuffered DIMM
256MB With 32M X 8 CL3
Transcend information Inc. 10
Serial Presence Detect Specification
Serial Presence Detect
Byte No. Function Described Standard
Specification
Vendor Part
0 # of Bytes Written into Serial Memory 128bytes 80
1 Total # of Bytes of S.P.D Memory 256bytes 08
2 Fundamental Memory Type SDRAM 04
3 # of Row Addresses on this Assembly 13 0D
4 # of Column Addresses on this Assembly 10 0A
5 # of Module Banks on this Assembly 1 bank 01
6 Data Width of this Assembly 64bits 40
7 Data Width Continuation 0 00
8 Voltage Interface Standard of this Assembly LVTTL3.3V 01
9 SDRAM Cycle Time (highest CAS latency) 7.5ns 75
10 SDRAM Access from Clock (highest CL) 5.4ns 54
11 DIMM configuration type (non-parity, ECC) None 00
12 Refresh Rate Type 7.8us/Self Refresh 82
13 Primary SDRAM Width X8 08
14 Error Checking SDRAM Width 64bit 00
15 Min Clock Delay Back to Back Random Address 1 clock 01
16 Burst Lengths Supported 1,2,4,8 & Full page 8F
17 Number of banks on each SDRAM device 4 bank 04
18 CAS # Latency 2,3 06
19 CS # Latency 0 clock 01
20 Write Latency 0 clock 01
21 SDRAM Module Attributes Non Buffer 00
22 SDRAM Device Attributes: General Prec All, Auto Prec,
R/W Burst
0E
23 SDRAM Cycle Time (2
nd
highest CL) 10ns A0
24 SDRAM Access from Clock (2
nd
highest CL) 6ns 60
25 SDRAM Cycle Time (3
rd
highest CL) - 00
26 SDRAM Access from Clock (3
rd
highest CL) - 00
27 Minimum Row Precharge Time 20ns 14
28 Minimum Row Active to Row Activate 16ns 0F
29 Minimum RAS to CAS Delay 20ns 14
30 Minimum RAS Pulse Width 45ns 2D
31 Density of Each Bank on Module 256MB 40
32 Command/Address Setup Time 1.5ns 15
33 Command/Address Hold Time 0.8ns 08
34 Data Signal Setup Time 1.5ns 15
35 Data Signal Hold Time 0.8ns 08
36-61 Superset Information - 00
62 SPD Data Revision Code JEDEC2 02
63 Checksum for Bytes 0-62 C2 C2
64-71 Manufacturers JEDEC ID Code per JEP-108E Transcend 7F, 4F
72 Manufacturing Location T 54
54 53 33 32 4D 4C73-90 Manufacturers Part Number TS32MLS64V6F
53 36 34 56 36 46
(11 pages)
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