W971GG8SB-3 查看數據表（PDF） - Winbond
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W971GG8SB-3 Datasheet PDF : 87 Pages
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W971GG8SB
16M 8 BANKS 8 BIT DDR2 SDRAM
Table of Contents-
1.
GENERAL DESCRIPTION ...................................................................................................................4
2.
FEATURES ...........................................................................................................................................4
3.
ORDER INFORMATION .......................................................................................................................4
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 ...............................................................................................................21
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
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
Publication Release Date: Jan. 09, 2015
Revision: A01
-1-
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