List of Figures
Figure 1: 4 Meg x 32 Functional Block Diagram ................................................................................................. 8
Figure 2: 86-Pin TSOP Pin Assignments (Top View) ........................................................................................... 9
Figure 3: 90-Ball FBGA Ball Assignments (Top View) ....................................................................................... 10
Figure 4: 86-Pin Plastic TSOP II (400 mil) – Package Codes TG/P ...................................................................... 12
Figure 5: 90-Ball VFBGA (8mm x 13mm) ......................................................................................................... 13
Figure 6: Example: Temperature Test Point Location, 54-Pin TSOP (Top View) ................................................. 15
Figure 7: Example: Temperature Test Point Location, 90-Ball VFBGA (Top View) .............................................. 16
Figure 8: ACTIVE Command .......................................................................................................................... 25
Figure 9: READ Command ............................................................................................................................. 26
Figure 10: WRITE Command ......................................................................................................................... 27
Figure 11: PRECHARGE Command ................................................................................................................ 28
Figure 12: Initialize and Load Mode Register .................................................................................................. 36
Figure 13: Mode Register Definition ............................................................................................................... 38
Figure 14: CAS Latency .................................................................................................................................. 41
Figure 15: Example: Meeting
t
RCD (MIN) When 2 <
t
RCD (MIN)/
t
CK
< 3 .......................................................... 42
Figure 16: Consecutive READ Bursts .............................................................................................................. 44
Figure 17: Random READ Accesses ................................................................................................................ 45
Figure 18: READ-to-WRITE ............................................................................................................................ 46
Figure 19: READ-to-WRITE With Extra Clock Cycle ......................................................................................... 47
Figure 20: READ-to-PRECHARGE .................................................................................................................. 47
Figure 21: Terminating a READ Burst ............................................................................................................. 48
Figure 22: Alternating Bank Read Accesses ..................................................................................................... 49
Figure 23: READ Continuous Page Burst ......................................................................................................... 50
Figure 24: READ – DQM Operation ................................................................................................................ 51
Figure 25: WRITE Burst ................................................................................................................................. 52
Figure 26: WRITE-to-WRITE .......................................................................................................................... 53
Figure 27: Random WRITE Cycles .................................................................................................................. 54
Figure 28: WRITE-to-READ ............................................................................................................................ 54
Figure 29: WRITE-to-PRECHARGE ................................................................................................................. 55
Figure 30: Terminating a WRITE Burst ............................................................................................................ 56
Figure 31: Alternating Bank Write Accesses ..................................................................................................... 57
Figure 32: WRITE – Continuous Page Burst ..................................................................................................... 58
Figure 33: WRITE – DQM Operation ............................................................................................................... 59
Figure 34: READ With Auto Precharge Interrupted by a READ ......................................................................... 61
Figure 35: READ With Auto Precharge Interrupted by a WRITE ........................................................................ 62
Figure 36: READ With Auto Precharge ............................................................................................................ 63
Figure 37: READ Without Auto Precharge ....................................................................................................... 64
Figure 38: Single READ With Auto Precharge .................................................................................................. 65
Figure 39: Single READ Without Auto Precharge ............................................................................................. 66
Figure 40: WRITE With Auto Precharge Interrupted by a READ ........................................................................ 67
Figure 41: WRITE With Auto Precharge Interrupted by a WRITE ...................................................................... 67
Figure 42: WRITE With Auto Precharge ........................................................................................................... 68
Figure 43: WRITE Without Auto Precharge ..................................................................................................... 69
Figure 44: Single WRITE With Auto Precharge ................................................................................................. 70
Figure 45: Single WRITE Without Auto Precharge ............................................................................................ 71
Figure 46: Auto Refresh Mode ........................................................................................................................ 73
Figure 47: Self Refresh Mode .......................................................................................................................... 75
Figure 48: Power-Down Mode ........................................................................................................................ 76
Figure 49: Clock Suspend During WRITE Burst ............................................................................................... 77
Figure 50: Clock Suspend During READ Burst ................................................................................................. 78
128Mb: x32 SDRAM
Features
PDF: 09005aef80872800
128mb_x32_sdram.pdf - Rev. U 04/13 EN
4
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© 2001 Micron Technology, Inc. All rights reserved.
