W947D6HBHX5I

W947D6HB / W947D2HB 128Mb Mobile LPDDR TABLE OF CONTENTS 1. GENERAL DESCRIPTION .......................................................................................................... 4 2. FEATURES.................................................................................................................................. 4 3. PIN CONFIGURATION ................................................................................................................ 5 3.1 Ball Assignment: LPDDR X16 .......................................................................................................... 5 3.2 Ball Assignment: LPDDR X32 .......................................................................................................... 5 4. PIN DESCRIPTION ..................................................................................................................... 6 4.1 Signal Descriptions ........................................................................................................................... 6 4.2 Addressing Table ............................................................................................................................. 7 5. BLOCK DIAGRAM ...................................................................................................................... 8 5.1 Block Diagram .................................................................................................................................. 8 5.2 Simplified State Diagram .................................................................................................................. 9 6. FUNCTION DESCRIPTION ....................................................................................................... 10 6.1 Initialization .................................................................................................................................... 10 6.1.1 Initialization Flow Diagram ....................................................................................................................11 6.1.2 Initialization Waveform Sequence .........................................................................................................12 6.2 Register Definition .......................................................................................................................... 12 6.2.1 Mode Register Set Operation ................................................................................................................12 6.2.2 Mode Register Definition .......................................................................................................................13 6.2.3. Burst Length .........................................................................................................................................13 6.3 Burst Definition ............................................................................................................................... 14 6.4 Burst Type ...................................................................................................................................... 15 6.5 Read Latency ................................................................................................................................. 15 6.6 Extended Mode Register Description ............................................................................................. 15 6.6.1 Extended Mode Register Definition ......................................................................................................16 6.7 Status Register Read ..................................................................................................................... 16 6.7.1 SRR Register (A n:0 = 0) .....................................................................................................................17 6.7.2 Status Register Read Timing Diagram .................................................................................................18 6.8 Partial Array Self Refresh ............................................................................................................... 19 6.9 Automatic Temperature Compensated Self Refresh ....................................................................... 19 6.10 Output Drive Strength ................................................................................................................... 19 6.11 Commands ................................................................................................................................... 19 6.11.1 Basic Timing Parameters for Commands ...........................................................................................19 6.11.2 Truth Table - Commands ....................................................................................................................20 6.11.3 Truth Table - DM Operations ..............................................................................................................21 6.11.4 Truth Table - CKE ...............................................................................................................................21 6.11.5 Truth Table - Current State BANKn - Command to BANKn ...............................................................22 6.11.6 Truth Table - Current State BANKn, Command to BANKn .................................................................23 7. OPERATION.............................................................................................................................. 24 7.1. Deselect ........................................................................................................................................ 24 7.2. No Operation ................................................................................................................................. 24 7.2.1 NOP Command .....................................................................................................................................25 Publication Release Date:Jun,17, 2011 - 1 - Revision A01-003 W947D6HB / W947D2HB 128Mb 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 Referesh ................................................................................................................................ 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:Jun,17, 2011 - 2 - Revision A01-003