W949D6DB Datasheet, PDF (2/60 Pages) Winbond – Standard Self Refresh Mode

W949D6DB / W949D2DB
8.4 Active..................................................................................................................................................27
8.4.1 Active Command ..................................................................................................................27
8.4.2 Bank Activation Command Cycle .........................................................................................28
8.5 Read...................................................................................................................................................28
8.5.1 Read Command ...................................................................................................................28
8.5.2 Basic Read Timing Parameters ............................................................................................29
8.5.3 Read Burst Showing CAS Latency.......................................................................................30
8.5.4 Read to Read .......................................................................................................................30
8.5.5 Consecutive Read Bursts .....................................................................................................30
8.5.6 Non-Consecutive Read Bursts .............................................................................................31
8.5.7 Random Read Bursts ...........................................................................................................32
8.5.8 Read Burst Terminate ..........................................................................................................32
8.5.9 Read to Write .......................................................................................................................33
8.5.10 Read to Precharge ...............................................................................................................34
8.5.11 Burst Terminate of Read ......................................................................................................35
8.6 Write ...................................................................................................................................................35
8.6.1 Write Command ...................................................................................................................35
8.6.2 Basic Write Timing Parameters ............................................................................................36
8.6.3 Write Burst (min. and max. tDQSS)......................................................................................37
8.6.4 Write to Write........................................................................................................................37
8.6.5 Concatenated Write Bursts...................................................................................................38
8.6.6 Non-Concatenated Write Bursts...........................................................................................38
8.6.7 Random Write Cycles...........................................................................................................39
8.6.8 Write to Read .......................................................................................................................39
8.6.9 Non-Interrupting Write to Read.............................................................................................39
8.6.10 Interrupting Write to Read ....................................................................................................40
8.6.11 Write to Precharge ...............................................................................................................40
8.6.12 Non-Interrupting Write to Precharge.....................................................................................40
8.6.13 Interrupting Write to Precharge ............................................................................................41
8.7 Precharge...........................................................................................................................................41
8.7.1 Precharge Command ...........................................................................................................42
8.8 Auto Precharge ..................................................................................................................................42
8.9 Refresh Requirements........................................................................................................................42
8.10 Auto Refresh ......................................................................................................................................43
8.10.1 Auto Refresh Command .......................................................................................................43
8.10.2 Auto Refresh Cycles Back-to-Back ......................................................................................43
8.11 Self Refresh........................................................................................................................................44
8.11.1 Self Refresh Command ........................................................................................................44
8.11.2 Self Refresh Entry and Exit ..................................................................................................45
8.12 Power Down .......................................................................................................................................46
8.12.1 Power-Down Entry and Exit..................................................................................................46
8.13 Deep Power Down..............................................................................................................................47
8.13.1 Deep Power-Down Entry and Exit ........................................................................................47
8.14 Clock Stop ..........................................................................................................................................48
8.14.1 Clock Stop Mode Entry and Exit...........................................................................................48
9. ELECTRICAL CHARACTERISTICS.................................................................................................................49
9.1 Absolute Maximum Ratings................................................................................................................49
Publication Release Date: Oct. 08, 2014
Revision: A01-003
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