EBD51RC4AAFA datasheet(6/17 Pages) ELPIDA

Part #	EBD51RC4AAFA

Description	512MB Registered DDR SDRAM DIMM

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Manufacturer	ELPIDA [Elpida Memory]

Direct Link	http://www.elpida.com/en

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6 / 17 page

EBD10RD4ABFA

Preliminary Data Sheet E0274E40 (Ver. 4.0)

6

Byte No.

Function described

Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Hex value

Comments

28

Minimum row active to row active

delay (tRRD)

-6B

0

1

0

30H

12ns

-7A, -7B

0

1

0

3CH

15ns

29

Minimum /RAS to /CAS delay (tRCD)

-6B

0

1

0

1

0

48H

18ns

-7A, -7B

0

1

0

1

0

50H

20ns

30

Minimum active to precharge time

(tRAS)

-6B

0

1

0

1

0

1

0

2AH

42ns

-7A, -7B

0

1

0

1

0

1

2DH

45ns

31

Module rank density

0

1

01H

1 rank

1GB

32

Address and command setup time

before clock (tIS)

-6B

0

1

0

1

0

1

75H

0.75ns*

3

-7A, -7B

1

0

1

0

90H

0.9ns*

3

33

Address and command hold time after

clock (tIH)

-6B

0

1

0

1

0

1

75H

0.75ns*

3

-7A, -7B

1

0

1

0

90H

0.9ns*

3

34

Data input setup time before clock

(tDS)

-6B

0

1

0

1

0

1

45H

0.45ns*

3

-7A, -7B

0

1

0

1

0

50H

0.5ns*

3

35

Data input hold time after clock (tDH)

-6B

0

1

0

1

0

1

45H

0.45ns*

3

-7A, -7B

0

1

0

1

0

50H

0.5ns*

3

36 to 40

Superset information

0

00H

Future use

41

Active command period (tRC)

-6B

0

1

0

3CH

60ns*

3

-7A, -7B

0

1

0

1

41H

65ns*

3

42

Auto refresh to active/

Auto refresh command cycle (tRFC)

-6B

0

1

0

1

0

48H

72ns*

3

-7A, -7B

0

1

0

1

0

1

4BH

75ns*

3

43

SDRAM tCK cycle max. (tCK max.)

0

1

0

30H

12ns*

3

44

Dout to DQS skew

-6B

0

1

0

1

0

1

2DH

450ps*

3

-7A, -7B

0

1

0

1

0

32H

500ps*

3

45

Data hold skew (tQHS)

-6B

0

1

0

1

0

1

0

1

55H

550ps*

3

-7A, -7B

0

1

0

1

0

1

75H

750ps*

3

46 to 61

Superset information

0

00H

Future use

62

SPD revision

0

00H

Initial

63

Checksum for bytes 0 to 62

-6B

1

0

1

0

1

D3H

211

-7A

1

0

1

0

1

0

8AH

138

-7B

1

0

1

0

1

0

1

B5H

181

64

Manufacturer’s JEDEC ID code

0

1

7FH

65

Manufacturer’s JEDEC ID code

0

1

7FH

66

Manufacturer’s JEDEC ID code

1

0

FEH

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