AS4SD16M16 datasheet(5/52 Pages) MICROSS

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SDRAM

AS4SD16M16

Rev. 2.6 04/13/15

Micross Components reserves the right to change products or specifications without notice.

FIGURE 1: Mode Register Definition

TABLE 1: Burst Definition

TYPE = SEQUENTIAL TYPE = INTERLEAVED

0-1

1-0

A1 A0

0-1-2-3

1-2-3-0

1-0-3-2

2-3-0-1

3-0-1-2

3-2-1-0

A2 A1 A0

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Full

Page

(y)

n=A0-A8

(location 0-y)

Cn, Cn+1, Cn+2, Cn+3,

Cn+4…

…Cn-1,

Cn…

Not Supported

BURST

LENGTH

STARTING

COLUMN

ORDER OF ACCESSES WITHIN A BURST

NOTES:

1. For full-page access: y=512

2. For a burst length of two, A1-A8 select the block-of-two burst;

A0 selects the starting column within the block.

3. For a burst length of four, A2-A8 select the block-of-four burst;

A0-A1 selects the starting column within the block.

4. For a burst length of eight, A3-A8 select the block-of-eight burst; A0-A2

selects the starting column within the block.

5. For a full-page burst, the full row is selected and A0-A8 select the starting

column.

6. Whenever a boundary of the block is reached within a given sequence

above, the following access wraps within the block.

7. For a burst length of one, A0-A8 select the unique column to be accessed,

and mode register bit M3 is ignored.

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