
W9412G6IH
2M
× 4 BANKS × 16 BITS DDR SDRAM
Publication Release Date: Sep. 16, 2009
- 1 -
Revision A06
Table of Contents-
1.
GENERAL DESCRIPTION ......................................................................................................... 4
2.
FEATURES ................................................................................................................................. 4
3.
KEY PARAMETERS ................................................................................................................... 5
4.
PIN CONFIGURATION ...............................................................................................................6
5.
PIN DESCRIPTION..................................................................................................................... 7
6.
BLOCK DIAGRAM ...................................................................................................................... 8
7.
FUNCTIONAL DESCRIPTION.................................................................................................... 9
7.1
Power Up Sequence....................................................................................................... 9
7.2
Command Function ...................................................................................................... 10
7.2.1
Bank Activate Command ........................................................................... 10
7.2.2
Bank Precharge Command........................................................................ 10
7.2.3
Precharge All Command............................................................................ 10
7.2.4
Write Command ......................................................................................... 10
7.2.5
Write with Auto-precharge Command........................................................ 10
7.2.6
Read Command......................................................................................... 10
7.2.7
Read with Auto-precharge Command ....................................................... 10
7.2.8
Mode Register Set Command.................................................................... 11
7.2.9
Extended Mode Register Set Command ................................................... 11
7.2.10
No-Operation Command............................................................................ 11
7.2.11
Burst Read Stop Command ....................................................................... 11
7.2.12
Device Deselect Command ....................................................................... 11
7.2.13
Auto Refresh Command ............................................................................ 11
7.2.14
Self Refresh Entry Command .................................................................... 12
7.2.15
Self Refresh Exit Command....................................................................... 12
7.2.16
Data Write Enable /Disable Command ...................................................... 12
7.3
Read Operation............................................................................................................. 12
7.4
Write Operation............................................................................................................. 13
7.5
Precharge ..................................................................................................................... 13
7.6
Burst Termination.......................................................................................................... 13
7.7
Refresh Operation......................................................................................................... 13
7.8
Power Down Mode ....................................................................................................... 14
7.9
Input Clock Frequency Change during Precharge Power Down Mode........................ 14
7.10
Mode Register Operation.............................................................................................. 14