W949D6CB Datasheet, PDF (2/60 Pages) Winbond – 512Mb Mobile LPDDR

W949D6CB / W949D2CB
512Mb Mobile LPDDR
7.3 Mode Register Set.................................................................................................................. 25
7.3.1 Mode Register Set Command........................................................................................................25
7.3.2 Mode Register Set Command Timing ............................................................................................26
7.4. Active .................................................................................................................................... 26
7.4.1 Active Command ............................................................................................................................26
7.4.2 Bank Activation Command Cycle ...................................................................................................27
7.5. Read ..................................................................................................................................... 27
7.5.1 Read Command .............................................................................................................................28
7.5.2 Basic Read Timing Parameters .....................................................................................................28
7.5.3 Read Burst Showing CAS Latency ................................................................................................29
7.5.4 Read to Read .................................................................................................................................29
7.5.5 Consecutive Read Bursts...............................................................................................................30
7.5.6 Non-Consecutive Read Bursts .......................................................................................................30
7.5.7 Random Read Bursts .....................................................................................................................31
7.5.8 Read Burst Terminate ....................................................................................................................31
7.5.9 Read to Write .................................................................................................................................32
7.5.10 Read to Pre-charge ......................................................................................................................32
7.5.11 Burst Terminate of Read ..............................................................................................................33
7.6 Write....................................................................................................................................... 33
7.6.1 Write Command .............................................................................................................................34
7.6.2 Basic Write Timing Parameters......................................................................................................34
7.6.3 Write Burst (min. and max. tDQSS) ...............................................................................................35
7.6.4 Write to Write..................................................................................................................................35
7.6.5 Concatenated Write Bursts ............................................................................................................36
7.6.6 Non-Consecutive Write Bursts .......................................................................................................36
7.6.7 Random Write Cycles.....................................................................................................................37
7.6.8 Write to Read .................................................................................................................................37
7.6.9 Non-Interrupting Write to Read ......................................................................................................37
7.6.10 Interrupting Write to Read ............................................................................................................38
7.6.11 Write to Precharge .......................................................................................................................38
7.6.12 Non-Interrupting Write to Precharge ............................................................................................38
7.6.13 Interrupting Write to Precharge ....................................................................................................39
7.7 Precharge............................................................................................................................... 39
7.7.1 Precharge Command .....................................................................................................................40
7.8 Auto Precharge ...................................................................................................................... 40
7.9 Refresh Requirements............................................................................................................ 40
7.10 Auto Refresh ........................................................................................................................ 40
7.10.1 Auto Refresh Command...............................................................................................................41
7.11 Self Refresh ......................................................................................................................... 41
7.11.1 Self Refresh Command ................................................................................................................42
7.11.2 Auto Refresh Cycles Back-to-Back ..............................................................................................42
7.11.3 Self Refresh Entry and Exit ..........................................................................................................43
7.12 Power Down ......................................................................................................................... 43
7.12.1 Power-Down Entry and Exit .........................................................................................................43
7.13 Deep Power Down ............................................................................................................... 44
Publication Release Date: Sep, 21, 2011
-2-
Revision A01-007