W9725G6JB Datasheet, PDF (2/87 Pages) Winbond – 4M  4 BANKS  16 BIT DDR2 SDRAM

W9725G6JB
7.4.2
Burst mode operation.......................................................................................................24
7.4.3
Burst read mode operation...............................................................................................25
7.4.4
Burst write mode operation ..............................................................................................25
7.4.5
Write data mask ...............................................................................................................26
7.5 Burst Interrupt .....................................................................................................................................26
7.6 Precharge operation............................................................................................................................27
7.6.1
Burst read operation followed by precharge.....................................................................27
7.6.2
Burst write operation followed by precharge ....................................................................27
7.7 Auto-precharge operation ...................................................................................................................27
7.7.1
Burst read with Auto-precharge .......................................................................................28
7.7.2
Burst write with Auto-precharge .......................................................................................28
7.8 Refresh Operation...............................................................................................................................29
7.9 Power Down Mode..............................................................................................................................29
7.9.1
Power Down Entry ...........................................................................................................30
7.9.2
Power Down Exit..............................................................................................................30
7.10 Input clock frequency change during precharge power down .............................................................30
8.
8.1
8.2
8.3
8.4
8.5
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
9.
ELECTRICAL CHARACTERISTICS ...................................................................................................37
9.1 Absolute Maximum Ratings ................................................................................................................37
9.2 Operating Temperature Condition.......................................................................................................37
9.3 Recommended DC Operating Conditions ...........................................................................................38
9.4 ODT DC Electrical Characteristics ......................................................................................................38
9.5 Input DC Logic Level...........................................................................................................................38
9.6 Input AC Logic Level ...........................................................................................................................38
9.7 Capacitance ........................................................................................................................................39
9.8 Leakage and Output Buffer Characteristics ........................................................................................39
9.9 DC Characteristics ..............................................................................................................................40
9.10 IDD Measurement Test Parameters....................................................................................................42
9.11 AC Characteristics ..............................................................................................................................43
9.11.1
AC Characteristics and Operating Condition for -18 speed grade ...................................43
9.11.2
AC Characteristics and Operating Condition for -25/25I/25A/25K/-3 speed grade...........45
9.12 AC Input Test Conditions ....................................................................................................................66
9.13 Differential Input/Output AC Logic Levels ...........................................................................................66
9.14 AC Overshoot / Undershoot Specification ...........................................................................................67
9.14.1
AC Overshoot / Undershoot Specification for Address and Control Pins: ........................67
9.14.2
AC Overshoot / Undershoot Specification for Clock, Data, Strobe and Mask pins:..........67
10.
TIMING WAVEFORMS .......................................................................................................................68
10.1 Command Input Timing.......................................................................................................................68
Publication Release Date: Nov. 29, 2011
-2-
Revision A02