W9412G6IH
2M × 4 BANKS × 16 BITS DDR SDRAM
Table of Contents-
1.
2.
3.
4.
5.
6.
7.
GENERAL DESCRIPTION ......................................................................................................... 4
FEATURES ................................................................................................................................. 4
KEY PARAMETERS ................................................................................................................... 5
PIN CONFIGURATION ............................................................................................................... 6
PIN DESCRIPTION..................................................................................................................... 7
BLOCK DIAGRAM ...................................................................................................................... 8
FUNCTIONAL DESCRIPTION.................................................................................................... 9
7.1
7.2
Power Up Sequence....................................................................................................... 9
Command Function ...................................................................................................... 10
7.2.1
7.2.2
7.2.3
7.2.4
7.2.5
7.2.6
7.2.7
7.2.8
7.2.9
7.2.10
7.2.11
7.2.12
7.2.13
7.2.14
7.2.15
7.2.16
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
7.3
7.4
7.5
7.6
7.7
7.8
7.9
7.10
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: Sep. 16, 2009
-1-
Revision A06
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