8

8, 16, 32 Meg x 64 Nonbuffered DRAM DIMMs

Micron Technology, Inc., reserves the right to change products or specifications without notice.

DM78.p65 – Rev. 2/99

©1999, Micron Technology, Inc.

8, 16, 32 MEG x 64

NONBUFFERED DRAM DIMMs

SERIAL PRESENCE-DETECT MATRIX

BYTE

DESCRIPTION

ENTRY (VERSION) BIT7

BIT6

BIT5

BIT4

BIT3

BIT2

BIT1

BIT0

HEX

0

NUMBER OF BYTES USED BY MICRON

128

10000000

80

1

TOTALNUMBEROFSPDMEMORYBYTES

256

00001000

08

2

MEMORY TYPE

EDO PAGE MODE

00000010

02

3

NUMBER OF ROW ADDRESSES

12

00001100

0C

4

NUMBER OF COLUMN ADDRESSES

11 (64MB)

00001011

0B

12(128MB,256MB)

00001100

0C

5

NUMBER OF BANKS

1 (64MB, 128MB)

00000001

01

2 (256MB)

00000010

02

6

DATAWIDTH

x64

01000000

40

7

DATA WIDTH (continued)

NONE

00000000

00

8

VOLTAGE INTERFACE

LVTTL

00000001

01

9

50ns (-5)

00110010

32

60ns (-6)

00111100

3C

10

13ns (-5)

00001101

0D

15ns (-6)

00001111

0F

11

MODULE CONFIGURATION TYPE

NONPARITY

00000000

00

12

REFRESH RATES

15.625µs/NORMAL

00000000

00

13

DRAMWIDTH(PRIMARYDRAM)

x8 (64MB)

00001000

08

x4(128MB,256MB)

00010000

10

14

ERRORCHECKINGDRAMDATAWIDTH

NONE

00000000

00

15-61

RESERVED

00000000

00

62

SPD REVISION

REV. 0

00000000

00

63

CHECKSUM FOR BYTES 0-62

64MB -5

00101010

2A

64MB -6

00110110

36

128MB -5

00110011

33

128MB -6

00111111

3F

256MB -5

00110100

34

256MB -6

01000000

40

64

MANUFACTURER’S JEDEC ID CODE

MICRON

00101100

2C

65-71

MANUFACTURER’S JEDEC CODE (CONT.)

11111111

FF

72

MANUFACTURINGLOCATION

00000001

01

00000010

02

00000011

03

00000100

04

73-90

MODULE PART NUMBER (ASCII)

xxxxxxxx

xx

91

PCB IDENTIFICATION CODE

1

00000001

01

2

00000010

02

3

00000011

03

4

00000100

04

92

IDENTIFICATION CODE (CONT.)

0

00000000

00

93

YEAR OF MANUFACTURE IN BCD

xxxxxxxx

xx

94

WEEK OF MANUFACTURE IN BCD

xxxxxxxx

xx

95-98

MODULE SERIAL NUMBER

xxxxxxxx

xx

99-125 MANUFACTURE SPECIFIC DATA (RSVD)

–––––––––

NOTE: 1. “1”/“0”: Serial Data, “driven to HIGH”/“driven to LOW.”

2. x = Variable Data.