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W9412G6JH
2M ? 4 BANKS ? 16 BITS DDR SDRAM
Table of Contents-
1.
2.
3.
4.
5.
6.
7.
8.
GENERAL DESCRIPTION ......................................................................................................... 4
FEATURES ................................................................................................................................. 4
ORDER INFORMATION ............................................................................................................. 5
KEY PARAMETERS ................................................................................................................... 5
PIN CONFIGURATION ............................................................................................................... 6
PIN DESCRIPTION..................................................................................................................... 7
BLOCK DIAGRAM ...................................................................................................................... 8
FUNCTIONAL DESCRIPTION.................................................................................................... 9
8.1
8.2
Power Up Sequence ....................................................................................................... 9
Command Function ...................................................................................................... 10
8.2.1
8.2.2
8.2.3
8.2.4
8.2.5
8.2.6
8.2.7
8.2.8
8.2.9
8.2.10
8.2.11
8.2.12
8.2.13
8.2.14
8.2.15
8.2.16
Bank Activate Command ........................................................................... 10
Bank Precharge Command........................................................................ 10
Precharge All Command ............................................................................ 10
Write Command ......................................................................................... 10
Write with Auto-precharge Command ........................................................ 10
Read Command ......................................................................................... 10
Read with Auto-precharge Command ....................................................... 10
Mode Register Set Command.................................................................... 11
Extended Mode Register Set Command ................................................... 11
No-Operation Command ............................................................................ 11
Burst Read Stop Command ....................................................................... 11
Device Deselect Command ....................................................................... 11
Auto Refresh Command ............................................................................ 11
Self Refresh Entry Command .................................................................... 12
Self Refresh Exit Command....................................................................... 12
Data Write Enable /Disable Command ...................................................... 12
8.3
8.4
8.5
8.6
8.7
8.8
8.9
8.10
Read Operation............................................................................................................. 12
Write Operation ............................................................................................................. 13
Precharge ..................................................................................................................... 13
Burst Termination.......................................................................................................... 13
Refresh Operation......................................................................................................... 13
Power Down Mode ....................................................................................................... 14
Input Clock Frequency Change during Precharge Power Down Mode ........................ 14
Mode Register Operation .............................................................................................. 14
Publication Release Date: Jan. 14, 2014
-1-
Revision: A04
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