W9825G6JB 4 M 4 BANKS 16 BITS SDRAM Table of Contents- 1. GENERAL DESCRIPTION ......................................................................................................... 3 2. FEATURES ................................................................................................................................. 3 3. ORDER INFORMATION ............................................................................................................. 3 4. BALL CONFIGURATION ............................................................................................................ 4 5. BALL 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 .................................................................................................................. 14 9.4 DC Characteristics ........................................................................................................ 14 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 Publication Release Date: Jul. 17, 2014 - 1 - Revision: A05 W9825G6JB 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 13. REVISION HISTORY ................................................................................................................ 42 Publication Release Date: Jul. 17, 2014 - 2 - Revision: A05
