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W9412G2CB

1M

脳

4 BANKS

脳

32 BITS GDDR SDRAM

Table of Contents-

1. GENERAL DESCRIPTION .................................................................................................................................4

2. FEATURES ........................................................................................................................................................4

3. KEY PARAMETERS...........................................................................................................................................5

4. BALL CONFIGURATION....................................................................................................................................6

5. BALL DESCRIPTION .........................................................................................................................................7

6. BLOCK DIAGRAM..............................................................................................................................................9

7. FUNCTIONAL DESCRIPTION .........................................................................................................................10

7.1

7.2

Power Up Sequence............................................................................................................ 10

Command Function ............................................................................................................. 10

7.2.1

7.2.2

7.2.3

7.2.4

7.2.5

7.2.6

7.2.7

7.2.8

7.2.9

7.2.10

7.2.11

7.2.12

7.2.13

7.2.14

7.2.15

7.2.16

Bank Activate Command ......................................................................................................10

Bank Precharge Command ..................................................................................................10

Precharge All Command ......................................................................................................10

Write Command ...................................................................................................................10

Write with Auto-precharge Command ..................................................................................11

Read Command ...................................................................................................................11

Read with Auto-precharge Command ..................................................................................11

Mode Register Set Command ..............................................................................................11

Extended Mode Register Set Command ..............................................................................11

No-Operation Command ......................................................................................................11

Burst Read Stop Command..................................................................................................12

Device Deselect Command ..................................................................................................12

Auto Refresh Command .......................................................................................................12

Self Refresh Entry Command...............................................................................................12

Self Refresh Exit Command .................................................................................................12

Data Write Enable /Disable Command .................................................................................13

7.3

7.4

7.5

7.6

7.7

7.8

7.9

Read Operation ................................................................................................................... 13

Write Operation ................................................................................................................... 13

Precharge ............................................................................................................................ 13

Burst Termination ................................................................................................................ 13

Refresh Operation ............................................................................................................... 14

Power Down Mode .............................................................................................................. 14

Input Clock Frequency Change during Precharge Power Down Mode .............................. 14

7.10.1

7.10.2

Burst Length field (A2 to A0) ................................................................................................15

Addressing Mode Select (A3)...............................................................................................15

7.10 Mode Register Operation .................................................................................................... 14

-1-

Publication Release Date:Nov. 19, 2007

Revision A09

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