PC DIMM Serial Presence Detect Tester/Decoder
By Philip Edelbrock, Christian Zuckschwerdt, Burkart Lingner and others
Version 2.9.2



Decoding EEPROM: /sys/bus/i2c/drivers/eeprom/0-0050
Guessing DIMM is inbank 1
The Following is Required Data and is Applicable to all DIMM Types
# of bytes written to SDRAM EEPROM128
Total number of bytes in EEPROM256
Fundamental Memory typeDDR SDRAM
Number of Row Address Bits (SDRAM only)13
Number of Col Address Bits (SDRAM only)10
Number of Module Rows1
Data Width (SDRAM only)64
Module Interface Signal LevelsSSTL 2.5
Cycle Time (SDRAM) highest CAS latency7ns
Maximum module speedDDR 285MHz (PC2200)
Access Time (SDRAM)7.5ns
Module Configuration TypeNo Parity
Refresh TypeSelf Refreshing
Refresh RateReduced (7.8uS)
Primary SDRAM Component Bank ConfigNo Bank2 OR Bank2 = Bank1 width
Primary SDRAM Component Widths8
Error Checking SDRAM Component Bank ConfigNo Bank2 OR Bank2 = Bank1 width
Error Checking SDRAM Component WidthsUndefined!
Min Clock Delay for Back to Back Random Access1
The Following Apply to SDRAM DIMMs ONLY
Burst lengths supportedBurst Length = 2
Burst Length = 4
Burst Length = 8
Number of Device Banks4
Supported CAS LatenciesCAS Latency = 3
CAS Latency = 4
Supported CS LatenciesCS Latency = 0
Supported WE LatenciesWE Latency = 1
SDRAM Module AttributesDifferential Clock Input
SDRAM Device Attributes (General)Lower VCC Tolerance:10%
Upper VCC Tolerance:10%
SDRAM Cycle Time (2nd highest CAS)7.5nS
SDRAM Access from Clock Time (2nd highest CAS)7.5nS
The Following are Optional (may be Bogus)
SDRAM Cycle Time (3rd highest CAS)Undefined!
SDRAM Access from Clock Time (3rd highest CAS)Undefined!
The Following are Required (for SDRAMs)
Minimum Row Precharge Time80nS
Row Active to Row Active Min60nS
RAS to CAS Delay80nS
Min RAS Pulse Width45nS
The Following are Required and Apply to ALL DIMMs
Row Densities256 MByte
The Following are Proposed and Apply to SDRAM DIMMs
Command and Address Signal Setup Time-1nS
Command and Address Signal Hold Time-1nS
Data Signal Setup Time5nS
Data Signal Hold Time5nS
SPD Revision code 0
EEPROM Checksum of bytes 0-62OK (0x8F)
Manufacturer's JEDEC ID Code0x0000000000000000
Manufacturer's JEDEC ID Code("")
Manufacturing Location Code0x00
Manufacurer's Part Number
Revision Code0x0000
Manufacturing Date0x0000
Intel Specification for FrequencyUndefined!
Intel Spec Details for 100MHz SupportJunction Temp B (100 degrees C)
Single Sided DIMM


Number of SDRAM DIMMs detected and decoded: 1