TM16SM64JBN 16777216 BY 64BIT

SYNCHRONOUS DYNAMIC RAM MODULE SODIMM

SMMS704 − MAY 1998

9

POST OFFICE BOX 1443

serial presence detect (continued)

Table 1. Serial Presence Detect Data (Continued)

BYTE

DESCRIPTION OF FUNCTION

TM16SM64JBN-10

BYTE

NO.

DESCRIPTION OF FUNCTION

ITEM

DATA

27

Minimum row-precharge time

tRP = 30 ns

1Eh

28

Minimum row-active to row-active delay

tRRD = 20 ns

14h

29

Minimum RAS-to-CAS delay

tRCD = 30 ns

1Eh

30

Minimum RAS pulse width

tRAS =50 ns

32h

31

Density of each bank on module

64M Bytes

10h

32

Command and address signal input setup time

tIS = 2 ns

20h

33

Command and address signal input hold time

tIH = 1 ns

10h

34

Data signal input setup time

tIS = 2 ns

20h

35

Data signal input hold time

tIH = 1 ns

10h

36 − 61

Superset features (may be used in the future)

62

SPD revision

Rev. 1.2

12h

63

Checksum for byte 0 − 62

19

13h

64 − 71

Manufacturer’s JEDEC ID code per JEP − 106E

97h

9700...00h

72

Manufacturing location†

TBD

73

Manufacturer’s part number

T

54h

74

Manufacturer’s part number

M

4Dh

75

Manufacturer’s part number

1

31h

76

Manufacturer’s part number

6

36h

77

Manufacturer’s part number

S

53h

78

Manufacturer’s part number

M

4Dh

79

Manufacturer’s part number

6

36h

80

Manufacturer’s part number

4

34h

81

Manufacturer’s part number

J

4Ah

82

Manufacturer’s part number

B

42h

83

Manufacturer’s part number

N

4Eh

84

Manufacturer’s part number

−

2Dh

85

Manufacturer’s part number

1

31h

86

Manufacturer’s part number

0

30h

87 − 90

Manufacturer’s part number

SPACE

20h

91

Die revision code†

TBD

92

PCB revision code†

TBD

93 − 94

Manufacturing date†

TBD

95 − 98

Assembly serial number†

TBD

99 − 125

Manufacturer-specific data†

TBD

126

Clock frequency

66 MHz

66h

127

SDRAM component and clock interconnection details

199

C7h

128−166

System-integrator’s-specific data‡

TBD

167−255

Open

† TBD indicates values that are determined at manufacturing time and are module dependent.

‡ These TBD values are determined and programmed by the customer (optional).