TM8LR64JFN 8 388 608 BY 64BIT

TM16LR64JFN 16 777 216 BY 64BIT

SYNCHRONOUS DYNAMIC RAM MODULES

SMMS710 − MAY 1998

12

POST OFFICE BOX 1443

serial presence detect (continued)

Table 1. Serial Presence-Detect Data for the TM8LR64JFN (Continued)

BYTE

DESCRIPTION OF FUNCTION

TM8LR64JFN-8

TM8LR64JFN-8A

BYTE

NO.

DESCRIPTION OF FUNCTION

ITEM

DATA

ITEM

DATA

28

Minimum row-active to row-active delay

tRRD = 16 ns

10h

tRRD = 16 ns

10h

29

Minimum RAS-to-CAS delay

tRCD = 20 ns

14h

tRCD = 20 ns

14h

30

Minimum RAS pulse width

tRAS = 48 ns

30h

tRAS = 48 ns

30h

31

Density of each bank on module

64M Bytes

10h

64M Bytes

10h

32

Command and address signal input setup time

tIS = 2 ns

20h

tIS = 2 ns

20h

33

Command and address signal input hold time

tIH = 1 ns

10h

tIH = 1 ns

10h

34

Data signal input setup time

tIS = 2 ns

20h

tIS = 2 ns

20h

35

Data signal input setup time

tIH = 1 ns

10h

tIH = 1 ns

10h

36 − 61

Superset features (may be used in the future)

62

SPD revision

Rev. 1.2

12h

Rev. 1.2

12h

63

Checksum for byte 0 − 62

95

5Fh

196

C4h

64 − 71

Manufacturer’s JEDEC ID code per JEP − 106E

97h

9700...

00h

97h

9700...

00h

72

Manufacturing location†

TBD

TBD

73

Manufacturer’s part number

T

54h

T

54h

74

Manufacturer’s part number

M

4Dh

M

4Dh

75

Manufacturer’s part number

8

38h

8

38h

76

Manufacturer’s part number

L

4Ch

L

4Ch

77

Manufacturer’s part number

R

52h

R

52h

78

Manufacturer’s part number

6

36h

6

36h

79

Manufacturer’s part number

4

34h

4

34h

80

Manufacturer’s part number

J

4Ah

J

4Ah

81

Manufacturer’s part number

F

46h

F

46h

82

Manufacturer’s part number

N

4Eh

N

4Eh

83

Manufacturer’s part number

—

2Dh

—

2Dh

84

Manufacturer’s part number

8

38h

8

38h

85

Manufacturer’s part number

SPACE

20h

A

41h

86 − 90

Manufacturer’s part number

SPACE

20h

SPACE

20h

73 − 90

Manufacturer’s part number†

TBD

TBD

91

Die revision code†

TBD

TBD

92

PCB revision code†

TBD

TBD

93 − 94

Manufacturing date†

TBD

TBD

95 − 98

Assembly serial number†

TBD

TBD

99 − 125

Manufacturer-specific data†

TBD

TBD

126

Clock frequency

100 MHz

64h

100 MHz

64h

127

SDRAM component and clock interconnection details

199

C7h

199

C7h

128−166

System-integrator-specific data‡

TBD

TBD

167−255

Open

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

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