A
S4C16M16MD1
256Mb MOBILE DDR SDRAM
TABLE OF CONTENTS
1. GENERAL DESCRIPTION ................................................................................................... 3
2. FEATURES........................................................................................................................... 3
3. PIN DESCRIPTION............................................................................................................... 4
3.1 Signal Descriptions..........................................................................................................................5
4. BLOCK DIAGRAM ............................................................................................................... 7
4.1 Block Diagram.................................................................................................................................7
4.2 Simplified State Diagram.................................................................................................................8
5. FUNCTION DESCRIPTION .................................................................................................. 9
5.1 Initialization......................................................................................................................................9
5.1.1 Initialization Flow Diagram ..................................................................................................................10
5.2 Register Definition.........................................................................................................................12
5.2.1 Mode Register............................................................................................................................12
5.3 Burst Definition ..............................................................................................................................13
5.2.1.2 Burst Type ...............................................................................................................................14
5.2.2 Extended Mode Register............................................................................................................14
5.2.2.1 Partial Array Self Refresh .......................................................................................................15
5.2.2.2 Temperature Compensated Self Refresh...............................................................................15
5.2.2.3 Output Drive Strength .............................................................................................................15
6. COMMANDS .................................................................................................................... 16
7.OPERATION........................................................................................................................ 21
7.1. Deselect........................................................................................................................................21
7.2. No Operation................................................................................................................................21
7.4. Active............................................................................................................................................22
7.5. Read.............................................................................................................................................23
7.5.1 Read to Read......................................................................................................................................25
6.5.11 Burst Terminate.................................................................................................................................30
7.6 Write ..............................................................................................................................................30
7.6.1 Write to Write .....................................................................................................................................32
7.7 Precharge......................................................................................................................................36
7.8 Auto Precharge .............................................................................................................................37
7.9 Refresh Requirements ..................................................................................................................37
7.10 Auto Refresh ...............................................................................................................................37
7.11 Self Referesh...............................................................................................................................37
7.12 Power Down................................................................................................................................39
7.13 Deep Power Down ......................................................................................................................41
7.14 Clock Stop...................................................................................................................................42
8. ELECTRICAL CHARACTERISTIC......................................................................................43
Mar, 28, 2013
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