SERIAL PRESENCE DETECT

PC100 Unbuffered DIMM

Rev 0.1 Apr. 2000

Byte #

Function Described

Function Supported

Hex value

Note

-1H

-1L

-1H

-1L

35

Data signal input hold time

1ns

1ns

10h

10h

36~61

Superset information (maybe used in future)

-

00h

62

SPD data revision code

PC100 SPD Spec. Ver. 1.2A

12h

63

Checksum for bytes 0 ~ 62

-

17h

47h

64

Manufacturer JEDEC ID code

Samsung

CEh

65~71

...... Manufacturer JEDEC ID code

Samsung

00h

72

Manufacturing location

Onyang Korea

01h

73

Manufacturer part # (Memory module)

M

4Dh

74

Manufacturer part # (DIMM configuration)

3

33h

75

Manufacturer part # (Data bits)

Blank

20h

76

...... Manufacturer part # (Data bits)

6

36h

77

...... Manufacturer part # (Data bits)

6

36h

78

Manufacturer part # (Mode & operating voltage)

S

53h

79

Manufacturer part # (Module depth)

3

33h

80

...... Manufacturer part # (Module depth)

3

33h

81

Manufacturer part # (Refresh, # of banks in Comp. & interface)

2

32h

82

Manufacturer part # (Composition component)

3

33h

83

Manufacturer part # (Component revision)

C

43h

84

Manufacturer part # (Package type)

T

54h

85

Manufacturer part # (PCB revision & type)

0

30h

86

Manufacturer part # (Hyphen)

" - "

2Dh

87

Manufacturer part # (Power)

C

43h

88

Manufacturer part # (Minimum cycle time)

1

1

31h

31h

89

Manufacturer part # (Minimum cycle time)

H

L

48h

4Ch

90

Manufacturer part # (TBD)

Blank

20h

91

Manufacturer revision code (For PCB)

0

30h

92

...... Manufacturer revision code (For component)

C-die (4th Gen.)

43h

93

Manufacturing date (Week)

-

-

3

94

Manufacturing date (Year)

-

-

3

95~98

Assembly serial #

-

-

4

99~125

Manufacturer specific data (may be used in future)

Undefined

-

5

126

System frequency for 100MHz

100MHz

64h

127

PC100 specification details

Detailed 100MHz Information

FFh

FDh

128+

Unused storage locations

Undefined

-

5

1. The bank select address is excluded in counting the total # of addresses.

2. This value is based on the component specification.

3. These bytes are programmed by code of Date Week & Date Year with BCD format.

4. These bytes are programmed by Samsung

′s own Assembly Serial # system. All modules may have different unique serial #.

5. These bytes are Undefined and can be used for Samsung

′s own purpose.

Note :