w9425g6eb Winbond Electronics Corp America, w9425g6eb Datasheet - Page 2

• Manufacturer Part Number: w9425g6eb
• Description: 4 M ? 4 Banks ? 16 Bits Ddr Sdram
• Manufacturer: Winbond Electronics Corp America

8.
9.
10.
11.
OPERATION MODE ....................................................................................................................................18
8.1
8.2
8.3
8.4
ELECTRICAL CHARACTERISTICS ............................................................................................................24
9.1
9.2
9.3
9.4
9.5
9.6
9.7
SYSTEM CHARACTERISTICS FOR DDR SDRAM.....................................................................................30
10.1
10.2
10.3
10.4
10.5
10.6
TIMING WAVEFORMS ................................................................................................................................33
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.9
11.10 Auto-precharge Timing (Write Cycle) ...............................................................................................41
11.11 Read Interrupted by Read (CL = 2, BL = 2, 4, 8)..............................................................................42
11.12 Burst Read Stop (BL = 8) .................................................................................................................42
11.13 Read Interrupted by Write & BST (BL = 8) .......................................................................................43
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 ..............................................................................................16
7.10.7 Reserved field ......................................................................................................................17
Simplified Truth Table ......................................................................................................................18
Function Truth Table ........................................................................................................................19
Function Truth Table for CKE...........................................................................................................22
Simplified Stated Diagram ................................................................................................................23
Absolute Maximum Ratings..............................................................................................................24
Recommended DC Operating Conditions ........................................................................................24
Capacitance .....................................................................................................................................25
Leakage and Output Buffer Characteristics......................................................................................25
DC Characteristics ...........................................................................................................................26
AC Characteristics and Operating Condition ....................................................................................27
AC Test Conditions ..........................................................................................................................28
Table 1: Input Slew Rate for DQ, DQS, and DM ..............................................................................30
Table 2: Input Setup & Hold Time Derating for Slew Rate ...............................................................30
Table 3: Input/Output Setup & Hold Time Derating for Slew Rate....................................................30
Table 4: Input/Output Setup & Hold Derating for Rise/Fall Delta Slew Rate ....................................30
Table 5: Output Slew Rate Characteristics (X16 Devices only)........................................................30
System Notes: ..................................................................................................................................31
Command Input Timing ....................................................................................................................33
Timing of the CLK Signals ................................................................................................................33
Read Timing (Burst Length = 4) .......................................................................................................34
Write Timing (Burst Length = 4) .......................................................................................................35
DM, DATA MASK (W9425G6EB).....................................................................................................36
Mode Register Set (MRS) Timing.....................................................................................................37
Extend Mode Register Set (EMRS) Timing ......................................................................................38
Auto-precharge Timing (Read Cycle, CL = 2) ..................................................................................39
Auto-precharge Timing (Read cycle, CL = 2), continued..................................................................40
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Publication Release Date:Feb. 12, 2009
W9425G6EB
Revision A02