EDD2508AKTA-5 datasheet(22/48 Pages) ELPIDA

Part #	EDD2508AKTA-5

Description	256M bits DDR SDRAM (32M words x 8 bits, DDR400)

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Manufacturer	ELPIDA [Elpida Memory]

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EDD2508AKTA-5

Preliminary Data Sheet E0349E60 (Ver. 6.0)

22

A0

0

DLL Enable

1

DLL Disable

DLL Control

A9

A8

A7

A6

A5

A4

A3

A2

A1

A0

0

00

0

00

0

DS

DLL

0

A11 A10

A12

BA1

0

BA0

1

EMRS

A1

0

Normal

1

Weak

Driver Strength

Extended Mode Register Set [EMRS] (BA0 = 1, BA1 = 0)

Burst Operation

The burst type (BT) and the first three bits of the column address determine the order of a data out.

A2

A1

A0

Addressing(decimal)

00

0

00

1

01

0

01

1

11

1

Interleave

Sequence

10

0

11

0

10

1

Starting Ad.

0, 1, 2, 3, 4, 5, 6, 7,

1, 2, 3, 4, 5, 6, 7,

2, 3, 4, 5, 6, 7,

3, 4, 5, 6, 7,

4, 5, 6, 7,

5, 6, 7,

6, 7,

7,

0,

0, 1,

0, 1, 2,

0, 1, 2, 3,

0, 1, 2, 3, 4,

0, 1, 2, 3, 4, 5,

0, 1, 2, 3, 4, 5, 6,

0, 1, 2, 3, 4, 5, 6, 7,

1, 0, 3, 2, 5, 4, 7,

2, 3, 0, 1, 6, 7,

3, 2, 1, 0, 7,

4, 5, 6, 7,

5, 4, 7,

6, 7,

7,

6,

4, 5,

6, 5, 4,

0, 1, 2, 3,

6, 1, 0, 3, 2,

4, 5, 2, 3, 0, 1,

6, 5, 4, 3, 2, 1, 0,

Burst length = 8

A1

A0

Addressing(decimal)

00

01

10

11

Interleave

Sequence

Starting Ad.

0, 1, 2, 3,

1, 2, 3, 0,

2, 3, 0, 1,

3, 0, 1, 2,

0, 1, 2, 3,

1, 0, 3, 2,

2, 3, 0, 1,

3, 2, 1, 0,

Burst length = 4

A0

Addressing(decimal)

0

1

Interleave

Sequence

Starting Ad.

0, 1,

1, 0,

0, 1,

1, 0,

Burst length = 2

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