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W9425G6KH Datasheet Preview

W9425G6KH Datasheet

4-M x 4-BANKS 16-BITS DDR SDRAM

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W9425G6KH
4 M 4 BANKS 16 BITS DDR SDRAM
Table of Contents-
1. GENERAL DESCRIPTION.............................................................................................................................4
2. FEATURES ....................................................................................................................................................4
3. ORDER INFORMATION ................................................................................................................................4
4. KEY PARAMETERS ......................................................................................................................................5
5. PIN CONFIGURATION ..................................................................................................................................6
6. PIN DESCRIPTION........................................................................................................................................7
7. BLOCK DIAGRAM .........................................................................................................................................8
8. FUNCTIONAL DESCRIPTION .......................................................................................................................9
8.1 Power Up Sequence ..........................................................................................................................9
8.2 Command Function ..........................................................................................................................10
8.2.1 Bank Activate Command ......................................................................................................10
8.2.2 Bank Precharge Command ..................................................................................................10
8.2.3 Precharge All Command ......................................................................................................10
8.2.4 Write Command ...................................................................................................................10
8.2.5 Write with Auto-precharge Command...................................................................................10
8.2.6 Read Command ...................................................................................................................10
8.2.7 Read with Auto-precharge Command ..................................................................................10
8.2.8 Mode Register Set Command ..............................................................................................11
8.2.9 Extended Mode Register Set Command ..............................................................................11
8.2.10 No-Operation Command ......................................................................................................11
8.2.11 Burst Read Stop Command..................................................................................................11
8.2.12 Device Deselect Command ..................................................................................................11
8.2.13 Auto Refresh Command .......................................................................................................11
8.2.14 Self Refresh Entry Command...............................................................................................12
8.2.15 Self Refresh Exit Command .................................................................................................12
8.2.16 Data Write Enable /Disable Command .................................................................................12
8.3 Read Operation ................................................................................................................................12
8.4 Write Operation ................................................................................................................................13
8.5 Precharge.........................................................................................................................................13
8.6 Burst Termination .............................................................................................................................13
8.7 Refresh Operation ............................................................................................................................13
8.8 Power Down Mode ...........................................................................................................................14
8.9 Input Clock Frequency Change during Precharge Power Down Mode ............................................14
8.10 Mode Register Operation .................................................................................................................14
8.10.1 Burst Length field (A2 to A0) ................................................................................................14
8.10.2 Addressing Mode Select (A3)...............................................................................................15
8.10.3 CAS Latency field (A6 to A4)................................................................................................16
8.10.4 DLL Reset bit (A8) ................................................................................................................16
8.10.5 Mode Register /Extended Mode register change bits (BA0, BA1) ........................................16
8.10.6 Extended Mode Register field ..............................................................................................16
8.10.7 Reserved field ......................................................................................................................16
9. OPERATION MODE ....................................................................................................................................17
Publication Release Date: Nov. 17, 2014
Revision: A02
-1-




Winbond

W9425G6KH Datasheet Preview

W9425G6KH Datasheet

4-M x 4-BANKS 16-BITS DDR SDRAM

No Preview Available !

W9425G6KH
9.1 Simplified Truth Table ......................................................................................................................17
9.2 Function Truth Table ........................................................................................................................18
9.3 Function Truth Table for CKE...........................................................................................................21
9.4 Simplified Stated Diagram ................................................................................................................22
10. ELECTRICAL CHARACTERISTICS ............................................................................................................23
10.1 Absolute Maximum Ratings..............................................................................................................23
10.2 Recommended DC Operating Conditions ........................................................................................23
10.3 Capacitance .....................................................................................................................................24
10.4 Leakage and Output Buffer Characteristics......................................................................................24
10.5 DC Characteristics ...........................................................................................................................25
10.6 AC Characteristics and Operating Condition ....................................................................................26
10.7 AC Test Conditions ..........................................................................................................................27
11. SYSTEM CHARACTERISTICS FOR DDR SDRAM.....................................................................................29
11.1 Table 1: Input Slew Rate for DQ, DQS, and DM ..............................................................................29
11.2 Table 2: Input Setup & Hold Time Derating for Slew Rate ...............................................................29
11.3 Table 3: Input/Output Setup & Hold Time Derating for Slew Rate....................................................29
11.4 Table 4: Input/Output Setup & Hold Derating for Rise/Fall Delta Slew Rate ....................................29
11.5 Table 5: Output Slew Rate Characteristics (x16 Devices only) ........................................................29
11.6 Table 6: Output Slew Rate Matching Ratio Characteristics ..............................................................30
11.7 Table 7: AC Overshoot/Undershoot Specification for Address and Control Pins..............................30
11.8 Table 8: Overshoot/Undershoot Specification for Data, Strobe, and Mask Pins...............................31
11.9 System Notes: ..................................................................................................................................32
12. TIMING WAVEFORMS ................................................................................................................................34
12.1 Command Input Timing ....................................................................................................................34
12.2 Timing of the CLK Signals ................................................................................................................34
12.3 Read Timing (Burst Length = 4) .......................................................................................................35
12.4 Write Timing (Burst Length = 4) .......................................................................................................36
12.5 DM, DATA MASK (W9425G6KH).....................................................................................................37
12.6 Mode Register Set (MRS) Timing.....................................................................................................38
12.7 Extend Mode Register Set (EMRS) Timing ......................................................................................39
12.8 Auto-precharge Timing (Read Cycle, CL = 2) ..................................................................................40
12.9 Auto-precharge Timing (Read cycle, CL = 2), continued..................................................................41
12.10 Auto-precharge Timing (Write Cycle) ...............................................................................................42
12.11 Read Interrupted by Read (CL = 2, BL = 2, 4, 8)..............................................................................43
12.12 Burst Read Stop (BL = 8) .................................................................................................................43
12.13 Read Interrupted by Write & BST (BL = 8) .......................................................................................44
12.14 Read Interrupted by Precharge (BL = 8) ..........................................................................................44
12.15 Write Interrupted by Write (BL = 2, 4, 8)...........................................................................................45
12.16 Write Interrupted by Read (CL = 2, BL = 8) ......................................................................................45
12.17 Write Interrupted by Read (CL = 3, BL = 4) ......................................................................................46
12.18 Write Interrupted by Precharge (BL = 8)...........................................................................................46
12.19 2 Bank Interleave Read Operation (CL = 2, BL = 2).........................................................................47
12.20 2 Bank Interleave Read Operation (CL = 2, BL = 4).........................................................................47
12.21 4 Bank Interleave Read Operation (CL = 2, BL = 2).........................................................................48
12.22 4 Bank Interleave Read Operation (CL = 2, BL = 4).........................................................................48
12.23 Auto Refresh Cycle ..........................................................................................................................49
12.24 Precharged/Active Power Down Mode Entry and Exit Timing ..........................................................49
12.25 Input Clock Frequency Change during Precharge Power Down Mode Timing.................................49
12.26 Self Refresh Entry and Exit Timing...................................................................................................50
Publication Release Date: Nov. 17, 2014
Revision: A02
-2-


Part Number W9425G6KH
Description 4-M x 4-BANKS 16-BITS DDR SDRAM
Maker Winbond
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