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W9412G2CB Datasheet Preview

W9412G2CB Datasheet

1M X 4 BANKS X 32 BITS GDDR SDRAM

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www.DataSheet.co.kr
W9412G2CB
1M × 4 BANKS × 32 BITS GDDR SDRAM
Table of Contents-
1. GENERAL DESCRIPTION .................................................................................................................................4
2. FEATURES ........................................................................................................................................................4
3. KEY PARAMETERS...........................................................................................................................................5
4. BALL CONFIGURATION....................................................................................................................................6
5. BALL DESCRIPTION .........................................................................................................................................7
6. BLOCK DIAGRAM..............................................................................................................................................9
7. FUNCTIONAL DESCRIPTION .........................................................................................................................10
7.1 Power Up Sequence............................................................................................................ 10
7.2 Command Function ............................................................................................................. 10
7.2.1 Bank Activate Command ......................................................................................................10
7.2.2 Bank Precharge Command ..................................................................................................10
7.2.3 Precharge All Command ......................................................................................................10
7.2.4 Write Command ...................................................................................................................10
7.2.5 Write with Auto-precharge Command ..................................................................................11
7.2.6 Read Command ...................................................................................................................11
7.2.7 Read with Auto-precharge Command ..................................................................................11
7.2.8
7.2.9
7.2.10
7.2.11
7.2.12
7.2.13
7.2.14
Mode Register Set Command ..............................................................................................11
Extended Mode Register Set Command ..............................................................................11
No-Operation Command ......................................................................................................11
Burst Read Stop Command..................................................................................................12
Device Deselect Command ..................................................................................................12
Auto Refresh Command .......................................................................................................12
Self Refresh Entry Command...............................................................................................12
7.2.15 Self Refresh Exit Command .................................................................................................12
7.2.16 Data Write Enable /Disable Command .................................................................................13
7.3 Read Operation ................................................................................................................... 13
7.4 Write Operation ................................................................................................................... 13
7.5 Precharge ............................................................................................................................ 13
7.6 Burst Termination ................................................................................................................ 13
7.7 Refresh Operation ............................................................................................................... 14
7.8 Power Down Mode .............................................................................................................. 14
7.9 Input Clock Frequency Change during Precharge Power Down Mode .............................. 14
7.10 Mode Register Operation .................................................................................................... 14
7.10.1 Burst Length field (A2 to A0) ................................................................................................15
7.10.2 Addressing Mode Select (A3)...............................................................................................15
Publication Release Date:Nov. 19, 2007
- 1 - Revision A09
Datasheet pdf - http://www.DataSheet4U.net/




Winbond

W9412G2CB Datasheet Preview

W9412G2CB Datasheet

1M X 4 BANKS X 32 BITS GDDR SDRAM

No Preview Available !

www.DataSheet.co.kr
W9412G2CB
7.10.3 CAS Latency field (A6 to A4)................................................................................................16
7.10.4 DLL Reset bit (A8) ................................................................................................................16
7.10.5 Mode Register /Extended Mode register change bits (BA0, BA1) ........................................16
7.10.6 Extended Mode Register field ..............................................................................................17
7.10.7 Reserved field ......................................................................................................................17
8. OPERATION MODE.........................................................................................................................................18
8.1 Simplified Truth Table.......................................................................................................... 18
8.2 Function Truth Table ........................................................................................................... 19
8.3 Function Truth Table, continued.......................................................................................... 20
8.4 Function Truth Table, continued.......................................................................................... 21
8.5 Function Truth Table for CKE.............................................................................................. 22
8.6 Simplified Stated Diagram................................................................................................... 23
9. ELECTRICAL CHARACTERISTICS.................................................................................................................24
9.1 Absolute Maximum Ratings................................................................................................. 24
9.2 Recommended DC Operating Conditions ........................................................................... 24
9.3 Capacitance......................................................................................................................... 25
9.4 Leakage and Output Buffer Characteristics ........................................................................ 25
9.5 DC Characteristics............................................................................................................... 26
9.6 AC Characteristics and Operating Condition....................................................................... 27
9.7 AC Test Conditions.............................................................................................................. 28
10. TIMING WAVEFORMS ....................................................................................................................................31
10.1 Command Input Timing ....................................................................................................... 31
10.2 Timing of the CLK Signals................................................................................................... 31
10.3 Read Timing (Burst Length = 4) .......................................................................................... 32
10.4 Write Timing (Burst Length = 4) .......................................................................................... 33
10.5 DM, DATA MASK (W9412G2CB) ....................................................................................... 34
10.6 Mode Register Set (MRS) Timing ....................................................................................... 35
10.7 Extend Mode Register Set (EMRS) Timing......................................................................... 36
10.8 Auto-precharge Timing (Read Cycle, CL = 2) ..................................................................... 37
10.9 Auto-precharge Timing (Read cycle, CL = 2), continued .................................................... 38
10.10 Auto-precharge Timing (Write Cycle) .................................................................................. 39
10.11 Read Interrupted by Read (CL = 2, BL = 2, 4, 8) ................................................................ 40
10.12 Burst Read Stop (BL = 8) .................................................................................................... 40
10.13 Read Interrupted by Write & BST (BL = 8).......................................................................... 41
10.14 Read Interrupted by Precharge (BL = 8) ............................................................................. 41
10.15 Write Interrupted by Write (BL = 2, 4, 8) ............................................................................. 42
10.16 Write Interrupted by Read (CL = 2, BL = 8)......................................................................... 42
Publication Release Date:Nov. 19, 2007
- 2 - Revision A09
Datasheet pdf - http://www.DataSheet4U.net/


Part Number W9412G2CB
Description 1M X 4 BANKS X 32 BITS GDDR SDRAM
Maker Winbond
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