W9425G6EH_0812 WINBOND [Winbond], W9425G6EH_0812 Datasheet

W9425G6EH_0812

Manufacturer Part Number

W9425G6EH_0812

Description

Manufacturer

WINBOND [Winbond]

Datasheet

1.W9425G6EH_0812.pdf (54 pages)

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Table of Contents-

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

FEATURES ....................................................................................................................................................4

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

PIN CONFIGURATION ..................................................................................................................................6

PIN DESCRIPTION........................................................................................................................................7

BLOCK DIAGRAM .........................................................................................................................................8

FUNCTIONAL DESCRIPTION.......................................................................................................................9

7.1

7.2

7.3

7.4

7.5

7.6

7.7

7.8

7.9

7.10

Power Up Sequence ..........................................................................................................................9

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

7.2.11 Burst Read Stop Command..................................................................................................11

7.2.12 Device Deselect Command ..................................................................................................11

7.2.13 Auto Refresh Command .......................................................................................................11

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

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

7.2.16 Data Write Enable /Disable Command .................................................................................12

Read Operation ................................................................................................................................12

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

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

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

Refresh Operation ............................................................................................................................13

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

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

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

7.10.1 Burst Length field (A2 to A0) ................................................................................................14

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

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

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

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

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

Write with Auto-precharge Command...................................................................................10

Read Command ...................................................................................................................10

Read with Auto-precharge Command ..................................................................................10

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

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

4 M × 4 BANKS × 16 BITS DDR SDRAM

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Publication Release Date:Dec. 03, 2008

W9425G6EH

Revision A08

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