Internet Data Sheet
HYS[64/72]T256020EU-[25F/2.5/3/3S/3.7]-B
Unbuffered DDR2 SDRAM Module
4
SPD Codes
This chapter lists all hexadecimal byte values stored in the EEPROM of the products described in this data sheet. SPD stands
for serial presence detect. All values with XX in the table are module specific bytes which are defined during production.
List of SPD Code Tables
•
•
•
•
•
Table 25 “SPD codes for HYS[64/72]T256020EU–25F–B” on Page 35
Table 26 “SPD codes for HYS[64/72]T256020EU–2.5–B” on Page 39
Table 27 “SPD codes for HYS[64/72]T256020EU–3–B” on Page 43
Table 28 “SPD codes for HYS[64/72]T256020EU–3S–B” on Page 47
Table 29 “SPD codes for HYS[64/72]T256020EU–3.7–B” on Page 51
TABLE 25
SPD codes for HYS[64/72]T256020EU–25F–B
Product Type
Organization
HYS64T256020EU–25F–B HYS72T256020EU–25F–B
2 GByte
×64
2 GByte
×72
2 Ranks (×8)
PC2–6400U–555
Rev. 1.2
HEX
2 Ranks (×8)
PC2–6400E–555
Rev. 1.2
HEX
Label Code
JEDEC SPD Revision
Byte#
Description
0
Programmed SPD Bytes in EEPROM
Total number of Bytes in EEPROM
Memory Type (DDR2)
80
08
08
0E
0A
61
40
00
05
25
40
00
82
08
00
00
0C
08
80
08
08
0E
0A
61
48
00
05
25
40
02
82
08
08
00
0C
08
1
2
3
Number of Row Addresses
Number of Column Addresses
DIMM Rank and Stacking Information
Data Width
4
5
6
7
Not used
8
Interface Voltage Level
9
t
t
CK @ CLMAX (Byte 18) [ns]
10
11
12
13
14
15
16
17
AC SDRAM @ CLMAX (Byte 18) [ns]
Error Correction Support (non-ECC, ECC)
Refresh Rate and Type
Primary SDRAM Width
Error Checking SDRAM Width
Not used
Burst Length Supported
Number of Banks on SDRAM Device
Rev. 1.0, 2006-10
35
10262006-SX8C-DEY8
QIMONDA [ QIMONDA AG ]
