W9425G6KH-5-TR Datasheet, PDF (1/52 Pages) Winbond – 4 M 4 BANKS 16 BITS DDR SDRAM

W9425G6KH
4 M  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
8.10.6 Extended Mode Register field ..............................................................................................16
8.10.7 Reserved field ......................................................................................................................16
9. OPERATION MODE ....................................................................................................................................17
Publication Release Date: Nov. 17, 2014
Revision: A02
-1-