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W9412G2IB Datasheet Preview

W9412G2IB Datasheet

1M X 4 BANKS X 32 BITS GDDR SDRAM

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W9412G2IB
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 ............................................................................................................................11
7.2.1 Bank Activate Command ......................................................................................................11
7.2.2 Bank Precharge Command ..................................................................................................11
7.2.3 Precharge All Command ......................................................................................................11
7.2.4 Write Command ...................................................................................................................11
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 Mode Register Set Command ..............................................................................................12
7.2.9 Extended Mode Register Set Command ..............................................................................12
7.2.10 No-Operation Command ......................................................................................................12
7.2.11 Burst Read Stop Command..................................................................................................12
7.2.12 Device Deselect Command ..................................................................................................12
7.2.13 Auto Refresh Command .......................................................................................................12
7.2.14 Self Refresh Entry Command...............................................................................................13
7.2.15 Self Refresh Exit Command .................................................................................................13
7.2.16 Data Write Enable /Disable Command .................................................................................13
7.3 Read Operation ..................................................................................................................................13
7.4 Write Operation ..................................................................................................................................14
7.5 Precharge...........................................................................................................................................14
7.6 Burst Termination ...............................................................................................................................14
7.7 Refresh Operation ..............................................................................................................................14
7.8 Power Down Mode .............................................................................................................................15
7.9 Input Clock Frequency Change during Precharge Power Down Mode...............................................15
7.10 Mode Register Operation ...................................................................................................................15
7.10.1 Burst Length field (A2 to A0) ................................................................................................16
7.10.2 Addressing Mode Select (A3)...............................................................................................16
Publication Release Date: Aug. 30, 2010
- 1 - Revision A06
Datasheet pdf - http://www.DataSheet4U.net/




Winbond

W9412G2IB Datasheet Preview

W9412G2IB Datasheet

1M X 4 BANKS X 32 BITS GDDR SDRAM

No Preview Available !

www.DataSheet.co.kr
W9412G2IB
7.10.3
7.10.4
7.10.5
7.10.6
7.10.7
CAS Latency field (A6 to A4)................................................................................................17
DLL Reset bit (A8) ................................................................................................................17
Mode Register /Extended Mode register change bits (BA0, BA1) ........................................17
Extended Mode Register field ..............................................................................................18
Reserved field ......................................................................................................................18
8. OPERATION MODE.........................................................................................................................................19
8.1 Simplified Truth Table.........................................................................................................................19
8.2 Function Truth Table ..........................................................................................................................20
8.3 Function Truth Table, continued .........................................................................................................21
8.4 Function Truth Table, continued .........................................................................................................22
8.5 Function Truth Table for CKE.............................................................................................................23
8.6 Simplified Stated Diagram ..................................................................................................................24
9. ELECTRICAL CHARACTERISTICS.................................................................................................................25
9.1 Absolute Maximum Ratings ................................................................................................................25
9.2 Recommended DC Operating Conditions ..........................................................................................25
9.3 Capacitance .......................................................................................................................................26
9.4 Leakage and Output Buffer Characteristics........................................................................................26
9.5 DC Characteristics..............................................................................................................................27
9.6 AC Characteristics and Operating Condition ......................................................................................28
9.7 AC Test Conditions.............................................................................................................................29
10. TIMING WAVEFORMS ....................................................................................................................................32
10.1 Command Input Timing ......................................................................................................................32
10.2 Timing of the CLK Signals ..................................................................................................................32
10.3 Read Timing (Burst Length = 4) .........................................................................................................33
10.4 Write Timing (Burst Length = 4)..........................................................................................................34
10.5 DM, DATA MASK (W9412G2IB) ........................................................................................................35
10.6 Mode Register Set (MRS) Timing.......................................................................................................36
10.7 Extend Mode Register Set (EMRS) Timing ........................................................................................37
10.8 Auto-precharge Timing (Read Cycle, CL = 2).....................................................................................38
10.9 Auto-precharge Timing (Read cycle, CL = 2), continued ....................................................................39
10.10 Auto-precharge Timing (Write Cycle) .................................................................................................40
10.11 Read Interrupted by Read (CL = 2, BL = 2, 4, 8) ................................................................................41
10.12 Burst Read Stop (BL = 8) ...................................................................................................................41
10.13 Read Interrupted by Write & BST (BL = 8) .........................................................................................42
10.14 Read Interrupted by Precharge (BL = 8) ............................................................................................42
10.15 Write Interrupted by Write (BL = 2, 4, 8) .............................................................................................43
10.16 Write Interrupted by Read (CL = 2, BL = 8) ........................................................................................43
10.17 Write Interrupted by Read (CL = 3, BL = 4) ........................................................................................44
10.18 Write Interrupted by Precharge (BL = 8).............................................................................................44
Publication Release Date: Aug. 30, 2010
- 2 - Revision A06
Datasheet pdf - http://www.DataSheet4U.net/


Part Number W9412G2IB
Description 1M X 4 BANKS X 32 BITS GDDR SDRAM
Maker Winbond
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