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W9812G2GB Datasheet Preview

W9812G2GB Datasheet

1M x 4 BANKS x 32BITS SDRAM

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W9812G2GB
1M × 4 BANKS × 32BITS SDRAM
Table of Contents-
1. GENERAL DESCRIPTION .............................................................................................................. 3
2. FEATURES...................................................................................................................................... 3
3. AVAILABLE PART NUMBER .......................................................................................................... 3
4. BALL CONFIGURATION................................................................................................................. 4
5. PIN DESCRIPTION ......................................................................................................................... 5
6. BLOCK DIAGRAM........................................................................................................................... 6
7. FUNCTIONAL DESCRIPTION ........................................................................................................ 7
7.1. Power Up and Initialization ................................................................................................. 7
7.2. Programming Mode Register .............................................................................................. 7
7.3. Bank Activate Command .................................................................................................... 7
7.4. Read and Write Access Modes .......................................................................................... 7
7.5. Burst Read Command ........................................................................................................ 8
7.6. Burst Write Command......................................................................................................... 8
7.7. Read Interrupted by a Read ............................................................................................... 8
7.8. Read Interrupted by a Write................................................................................................ 8
7.9. Write Interrupted by a Write ................................................................................................ 8
7.10. Write Interrupted by a Read................................................................................................ 8
7.11. Burst Stop Command.......................................................................................................... 9
7.12. Addressing Sequence of Sequential Mode......................................................................... 9
7.13. Addressing Sequence of Interleave Mode.......................................................................... 9
7.14. Auto-precharge Command................................................................................................ 10
7.15. Precharge Command........................................................................................................ 10
7.16. Self Refresh Command..................................................................................................... 10
7.17. Power Down Mode............................................................................................................ 11
7.18. No Operation Command ................................................................................................... 11
7.19. Deselect Command .......................................................................................................... 11
7.20. Clock Suspend Mode........................................................................................................ 11
8. OPERATION MODE...................................................................................................................... 12
9. ELECTRICAL CHARACTERISTICS ............................................................................................. 13
9.1. Absolute Maximum Ratings .............................................................................................. 13
9.2. Recommended DC Operating Conditions ........................................................................ 13
9.3. Capacitance ...................................................................................................................... 13
9.4. DC Characteristics ............................................................................................................ 14
Publication Release Date: Aug. 13,2007
- 1 - Revision A07




Winbond

W9812G2GB Datasheet Preview

W9812G2GB Datasheet

1M x 4 BANKS x 32BITS SDRAM

No Preview Available !

www.DataSheet4U.com
W9812G2GB
9.5. AC Characteristics and Operating Condition .................................................................... 15
10. TIMING WAVEFORMS.................................................................................................................. 17
10.1. Command Input Timing..................................................................................................... 17
10.2. Read Timing...................................................................................................................... 18
10.3. Control Timing of Input/Output Data ................................................................................. 19
10.4. Mode Register Set Cycle .................................................................................................. 20
11. OPERATING TIMING EXAMPLE.................................................................................................. 21
11.1. Interleaved Bank Read (Burst Length = 4, CAS Latency = 3) .......................................... 21
11.2. Interleaved Bank Read (Burst Length = 4, CAS Latency = 3, Auto-precharge) ............... 22
11.3. Interleaved Bank Read (Burst Length = 8, CAS Latency = 3) .......................................... 23
11.4. Interleaved Bank Read (Burst Length = 8, CAS Latency = 3, Auto-precharge) ............... 24
11.5. Interleaved Bank Write (Burst Length = 8) ....................................................................... 25
11.6. Interleaved Bank Write (Burst Length = 8, Auto-precharge) ............................................ 26
11.7. Page Mode Read (Burst Length = 4, CAS Latency = 3)................................................... 27
11.8. Page Mode Read / Write (Burst Length = 8, CAS Latency = 3) ....................................... 28
11.9. Auto-precharge Read (Burst Length = 4, CAS Latency = 3) ............................................ 29
11.10. Auto-precharge Write (Burst Length = 4).......................................................................... 30
11.11. Auto Refresh Cycle ........................................................................................................... 31
11.12. Self Refresh Cycle ............................................................................................................ 32
11.13. Burst Read and Single Write (Burst Length = 4, CAS Latency = 3) ................................. 33
11.14. Power Down Mode............................................................................................................ 34
11.15. Auto-precharge Timing (Read Cycle) ............................................................................... 35
11.16. Auto-precharge Timing (Write Cycle) ............................................................................... 36
11.17. Timing Chart of Read to Write Cycle ................................................................................ 37
11.18. Timing Chart of Write to Read Cycle ................................................................................ 37
11.19. Timing Chart of Burst Stop Cycle (Burst Stop Command) ............................................... 38
11.20. Timing Chart of Burst Stop Cycle (Precharge Command)................................................ 38
11.21. CKE/DQM Input Timing (Write Cycle) .............................................................................. 39
11.22. CKE/DQM Input Timing (Read Cycle) .............................................................................. 40
12. PACKAGE SPECIFICATION......................................................................................................... 41
12.1. TFBGA 90 Balls pitch=0.8mm .......................................................................................... 41
13. REVISION HISTORY..................................................................................................................... 42
Publication Release Date: Aug. 13,2007
- 2 - Revision A07


Part Number W9812G2GB
Description 1M x 4 BANKS x 32BITS SDRAM
Maker Winbond
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W9812G2GB Datasheet PDF





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