W9751G6IB-25【PDF 2/86 页】IC DDR2-800 SDRAM 512MB 84-WBGA

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W9751G6IB

7.4.2

7.4.3

7.4.4

7.4.5

Burst mode operation.......................................................................................................24

Burst read mode operation...............................................................................................25

Burst write mode operation ..............................................................................................25

Write data mask ...............................................................................................................26

7.5

7.6

Burst Interrupt .....................................................................................................................................26

Precharge operation............................................................................................................................27

7.6.1

7.6.2

Burst read operation followed by precharge.....................................................................27

Burst write operation followed by precharge ....................................................................27

7.7

Auto-precharge operation ...................................................................................................................27

7.7.1

7.7.2

Burst read with Auto-precharge........................................................................................28

Burst write with Auto-precharge .......................................................................................28

7.8

7.9

Refresh Operation...............................................................................................................................29

Power Down Mode..............................................................................................................................29

7.9.1

7.9.2

Power Down Entry ...........................................................................................................30

Power Down Exit..............................................................................................................30

8.

9.

7.10

8.1

8.2

8.3

8.4

8.5

9.1

9.2

9.3

9.4

9.5

9.6

9.7

9.8

9.9

Input clock frequency change during precharge power down .............................................................30

OPERATION MODE ...........................................................................................................................31

Command Truth Table ........................................................................................................................31

Clock Enable (CKE) Truth Table for Synchronous Transitions............................................................32

Data Mask (DM) Truth Table...............................................................................................................32

Function Truth Table ...........................................................................................................................33

Simplified Stated Diagram...................................................................................................................36

ELECTRICAL CHARACTERISTICS ...................................................................................................37

Absolute Maximum Ratings.................................................................................................................37

Operating Temperature Condition.......................................................................................................37

Recommended DC Operating Conditions ...........................................................................................37

ODT DC Electrical Characteristics ......................................................................................................38

Input DC Logic Level...........................................................................................................................38

Input AC Logic Level ...........................................................................................................................38

Capacitance ........................................................................................................................................39

Leakage and Output Buffer Characteristics ........................................................................................39

DC Characteristics ..............................................................................................................................40

9.9.1

DC Characteristics for 25F/-25/-3 speed grades ..............................................................40

9.10

9.11

IDD Measurement Test Parameters....................................................................................................42

AC Characteristics ..............................................................................................................................43

9.11.1

9.11.2

AC Characteristics and Operating Condition for 25F speed grade ..................................43

AC Characteristics and Operating Condition for -25/-3 speed grade ...............................45

9.12

9.13

9.14

AC Input Test Conditions ....................................................................................................................65

Differential Input/Output AC Logic Levels ...........................................................................................65

AC Overshoot / Undershoot Specification ...........................................................................................66

9.14.1

9.14.2

AC Overshoot / Undershoot Specification for Address and Control Pins: ........................66

AC Overshoot / Undershoot Specification for Clock, Data, Strobe and Mask pins:..........66

10.

TIMING WAVEFORMS .......................................................................................................................67

Publication Release Date: Oct. 23, 2009

-2-

Revision A06

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