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W9712G6KB Datasheet Preview

W9712G6KB Datasheet

2M x 4-BANKS x 16-BIT DDR2 SDRAM

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W9712G6KB
2M 4 BANKS 16 BIT DDR2 SDRAM
Table of Contents-
1. GENERAL DESCRIPTION ...................................................................................................................4
2. FEATURES ...........................................................................................................................................4
3. ORDER INFORMATION .......................................................................................................................5
4. KEY PARAMETERS .............................................................................................................................5
5. BALL CONFIGURATION ......................................................................................................................6
6. BALL DESCRIPTION............................................................................................................................7
7. BLOCK DIAGRAM ................................................................................................................................8
8. FUNCTIONAL DESCRIPTION..............................................................................................................9
8.1 Power-up and Initialization Sequence ...................................................................................................9
8.2 Mode Register and Extended Mode Registers Operation ...................................................................10
8.2.1
Mode Register Set Command (MRS)...............................................................................10
8.2.2
Extend Mode Register Set Commands (EMRS) ..............................................................11
8.2.2.1
Extend Mode Register Set Command (1), EMR (1)................................................11
8.2.2.2
DLL Enable/Disable................................................................................................12
8.2.2.3
Extend Mode Register Set Command (2), EMR (2)................................................13
8.2.2.4
Extend Mode Register Set Command (3), EMR (3)................................................14
8.2.3
Off-Chip Driver (OCD) Impedance Adjustment ................................................................15
8.2.3.1
Extended Mode Register for OCD Impedance Adjustment ....................................16
8.2.3.2
OCD Impedance Adjust ..........................................................................................16
8.2.3.3
Drive Mode .............................................................................................................17
8.2.4
On-Die Termination (ODT)...............................................................................................18
8.2.5
ODT related timings .........................................................................................................18
8.2.5.1
MRS command to ODT update delay.....................................................................18
8.3 Command Function.............................................................................................................................20
8.3.1
Bank Activate Command..................................................................................................20
8.3.2
Read Command ...............................................................................................................20
8.3.3
Write Command ...............................................................................................................21
8.3.4
Burst Read with Auto-precharge Command.....................................................................21
8.3.5
Burst Write with Auto-precharge Command.....................................................................21
8.3.6
Precharge All Command ..................................................................................................21
8.3.7
Self Refresh Entry Command ..........................................................................................21
8.3.8
Self Refresh Exit Command .............................................................................................22
8.3.9
Refresh Command ...........................................................................................................22
8.3.10
No-Operation Command ..................................................................................................23
8.3.11
Device Deselect Command..............................................................................................23
8.4 Read and Write access modes ...........................................................................................................23
8.4.1
Posted CAS ....................................................................................................................23
Publication Release Date: Feb. 14, 2014
- 1 - Revision: A03




Winbond

W9712G6KB Datasheet Preview

W9712G6KB Datasheet

2M x 4-BANKS x 16-BIT DDR2 SDRAM

No Preview Available !

W9712G6KB
8.4.1.1
Examples of posted CAS operation......................................................................23
8.4.2
Burst mode operation.......................................................................................................24
8.4.3
Burst read mode operation...............................................................................................25
8.4.4
Burst write mode operation ..............................................................................................25
8.4.5
Write data mask ...............................................................................................................26
8.5 Burst Interrupt .....................................................................................................................................26
8.6 Precharge operation............................................................................................................................27
8.6.1
Burst read operation followed by precharge.....................................................................27
8.6.2
Burst write operation followed by precharge ....................................................................27
8.7 Auto-precharge operation ...................................................................................................................27
8.7.1
Burst read with Auto-precharge........................................................................................28
8.7.2
Burst write with Auto-precharge .......................................................................................28
8.8 Refresh Operation...............................................................................................................................29
8.9 Power Down Mode..............................................................................................................................29
8.9.1
Power Down Entry ...........................................................................................................30
8.9.2
Power Down Exit..............................................................................................................30
8.10 Input clock frequency change during precharge power down .............................................................30
9.
9.1
9.2
9.3
9.4
9.5
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
10. ELECTRICAL CHARACTERISTICS ...................................................................................................37
10.1 Absolute Maximum Ratings.................................................................................................................37
10.2 Operating Temperature Condition.......................................................................................................37
10.3 Recommended DC Operating Conditions ...........................................................................................38
10.4 ODT DC Electrical Characteristics ......................................................................................................38
10.5 Input DC Logic Level...........................................................................................................................38
10.6 Input AC Logic Level ...........................................................................................................................38
10.7 Capacitance ........................................................................................................................................39
10.8 Leakage and Output Buffer Characteristics ........................................................................................39
10.9 DC Characteristics ..............................................................................................................................40
10.10
IDD Measurement Test Parameters ..........................................................................................42
10.11
AC Characteristics .....................................................................................................................43
10.11.1
AC Characteristics and Operating Condition for -18 speed grade ...................................43
10.11.2
AC Characteristics and Operating Condition for -25/25I/25A/25K/-3 speed grades .........45
10.12
AC Input Test Conditions...........................................................................................................66
10.13
10.14
Differential Input/Output AC Logic Levels ..................................................................................66
AC Overshoot / Undershoot Specification .................................................................................67
10.14.1
AC Overshoot / Undershoot Specification for Address and Control Pins: ........................67
10.14.2
AC Overshoot / Undershoot Specification for Clock, Data, Strobe and Mask pins:..........67
11. TIMING WAVEFORMS .......................................................................................................................68
Publication Release Date: Feb. 14, 2014
- 2 - Revision: A03


Part Number W9712G6KB
Description 2M x 4-BANKS x 16-BIT DDR2 SDRAM
Maker Winbond
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