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W972GG6JB
16M ? 8 BANKS ? 16 BIT DDR2 SDRAM
Table of Contents-
1.
2.
3.
4.
5.
6.
7.
7.1
7.2
GENERAL DESCRIPTION ................................................................................................................... 4
FEATURES ........................................................................................................................................... 4
KEY PARAMETERS ............................................................................................................................. 5
BALL CONFIGURATION ...................................................................................................................... 6
BALL DESCRIPTION ............................................................................................................................ 7
BLOCK DIAGRAM ................................................................................................................................ 8
FUNCTIONAL DESCRIPTION .............................................................................................................. 9
Power-up and Initialization Sequence ................................................................................................... 9
Mode Register and Extended Mode Registers Operation ................................................................... 10
7.2.1
7.2.2
7.2.2.1
7.2.2.2
7.2.2.3
7.2.2.4
7.2.3
7.2.3.1
7.2.3.2
7.2.3.3
7.2.4
7.2.5
7.2.5.1
Mode Register Set Command (MRS)............................................................................... 10
Extend Mode Register Set Commands (EMRS) .............................................................. 11
Extend Mode Register Set Command (1), EMR (1)................................................ 11
DLL Enable/Disable ................................................................................................ 12
Extend Mode Register Set Command (2), EMR (2) ................................................ 13
Extend Mode Register Set Command (3), EMR (3) ................................................ 14
Off-Chip Driver (OCD) Impedance Adjustment ................................................................ 15
Extended Mode Register for OCD Impedance Adjustment .................................... 16
OCD Impedance Adjust .......................................................................................... 16
Drive Mode ............................................................................................................. 17
On-Die Termination (ODT) ............................................................................................... 18
ODT related timings ......................................................................................................... 18
MRS command to ODT update delay ..................................................................... 18
7.3
Command Function ............................................................................................................................. 20
7.3.1
7.3.2
7.3.3
7.3.4
7.3.5
7.3.6
7.3.7
7.3.8
7.3.9
7.3.10
7.3.11
Bank Activate Command.................................................................................................. 20
Read Command ............................................................................................................... 21
Write Command ............................................................................................................... 21
Burst Read with Auto-precharge Command..................................................................... 21
Burst Write with Auto-precharge Command ..................................................................... 21
Precharge All Command .................................................................................................. 21
Self Refresh Entry Command .......................................................................................... 21
Self Refresh Exit Command ............................................................................................. 22
Refresh Command ........................................................................................................... 22
No-Operation Command .................................................................................................. 23
Device Deselect Command .............................................................................................. 23
7.4
Read and Write access modes ........................................................................................................... 23
7.4.1
Posted CAS .................................................................................................................... 23
Publication Release Date: Nov. 29, 2011
-1-
Revision A02
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