Document
W9412G6KH
2M 4 BANKS 16 BITS DDR SDRAM
Table of Contents-
1. GENERAL DESCRIPTION ......................................................................................................... 4
2. FEATURES ................................................................................................................................. 4
3. ORDER INFORMATION ............................................................................................................. 4
4. KEY PARAMETERS ................................................................................................................... 5
5. PIN CONFIGURATION ............................................................................................................... 6
6. PIN DESCRIPTION..................................................................................................................... 7
7. BLOCK DIAGRAM ...................................................................................................................... 8
8. FUNCTIONAL DESCRIPTION.................................................................................................... 9
8.1 Power Up Sequence....................................................................................................... 9
8.2 Command Function ...................................................................................................... 10
8.2.1
Bank Activate Command ........................................................................... 10
8.2.2
Bank Precharge Command........................................................................ 10
8.2.3
Precharge All Command............................................................................ 10
8.2.4
Write Command ......................................................................................... 10
8.2.5
Write with Auto-precharge Command........................................................ 10
8.2.6
Read Command ......................................................................................... 10
8.2.7
Read with Auto-precharge Command ....................................................... 10
8.2.8
Mode Register Set Command.................................................................... 11
8.2.9
Extended Mode Register Set Command ................................................... 11
8.2.10 No-Operation Command............................................................................ 11
8.2.11 Burst Read Stop Command ....................................................................... 11
8.2.12 Device Deselect Command ....................................................................... 11
8.2.13 Auto Refresh Command ............................................................................ 11
8.2.14 Self Refresh Entry Command .................................................................... 12
8.2.15 Self Refresh Exit Command....................................................................... 12
8.2.16 Data Write Enable /Disable Command ...................................................... 12
8.3 Read Operation............................................................................................................. 12
8.4 Write Operation............................................................................................................. 13
8.5 Precharge ..................................................................................................................... 13
8.6 Burst Termination.......................................................................................................... 13
8.7 Refresh Operation......................................................................................................... 13
8.8 Power Down Mode ....................................................................................................... 14
8.9 Input Clock Frequency Change during Precharge Power Down Mode........................ 14
8.10 Mode Register Operation.............................................................................................. 14
8.10.1 Burst Length field (A2 to A0)...................................................................... 14
8.10.2 Addressing Mode Select (A3) .................................................................... 15
8.10.3 CAS Latency field (A6 to A4) ..................................................................... 16
8.10.4 DLL Reset bit (A8) ..................................................................................... 16
8.10.5 Mode Register /Extended Mode register change bits (BA0, BA1)............. 16
Publication Release Date: Nov. 17, 2014 Revision: A03
-1-
W9412G6KH
8.10.6 Extended Mode Register field.................................................................... 16 8.10.7 Reserved field ............................................................................................ 16 9. OPERATION MODE ..............................