Contents
General Description ......................................................................................................................................... 8
Functional Block Diagram ................................................................................................................................ 9
Ball Assignments and Descriptions ................................................................................................................. 10
Package Dimensions ....................................................................................................................................... 13
Electrical Specifications .................................................................................................................................. 15
Absolute Maximum Ratings ........................................................................................................................ 15
Electrical Specifications – IDD Parameters ........................................................................................................ 17
Electrical Specifications – AC Operating Conditions ......................................................................................... 20
Output Drive Characteristics ........................................................................................................................... 23
Functional Description ................................................................................................................................... 26
Commands .................................................................................................................................................... 27
COMMAND INHIBIT .................................................................................................................................. 28
NO OPERATION (NOP) ............................................................................................................................... 28
LOAD MODE REGISTER (LMR) ................................................................................................................... 28
ACTIVE ...................................................................................................................................................... 28
READ ......................................................................................................................................................... 29
WRITE ....................................................................................................................................................... 30
PRECHARGE .............................................................................................................................................. 31
BURST TERMINATE ................................................................................................................................... 31
AUTO REFRESH ......................................................................................................................................... 31
SELF REFRESH ........................................................................................................................................... 32
DEEP POWER-DOWN ................................................................................................................................. 32
Truth Tables ................................................................................................................................................... 33
Initialization .................................................................................................................................................. 38
Mode Register ................................................................................................................................................ 40
Burst Length .............................................................................................................................................. 41
Burst Type .................................................................................................................................................. 41
CAS Latency ............................................................................................................................................... 43
Operating Mode ......................................................................................................................................... 43
Write Burst Mode ....................................................................................................................................... 43
Extended Mode Register ................................................................................................................................. 44
Temperature-Compensated Self Refresh ...................................................................................................... 44
Partial-Array Self Refresh ............................................................................................................................ 45
Output Drive Strength ................................................................................................................................ 45
Bank/Row Activation ...................................................................................................................................... 46
READ Operation ............................................................................................................................................. 47
WRITE Operation ........................................................................................................................................... 56
Burst Read/Single Write .............................................................................................................................. 63
PRECHARGE Operation .................................................................................................................................. 64
Auto Precharge ........................................................................................................................................... 64
AUTO REFRESH Operation ............................................................................................................................. 76
SELF REFRESH Operation ............................................................................................................................... 78
Power-Down .................................................................................................................................................. 80
Deep Power-Down ......................................................................................................................................... 81
Clock Suspend ............................................................................................................................................... 82
Revision History ............................................................................................................................................. 85
Rev. H, Production – 12/09 .......................................................................................................................... 85
Rev. G, Production – 8/09 ............................................................................................................................ 85
Rev. F, Production – 4/09 ............................................................................................................................. 85
Rev. E, Production – 3/09 ............................................................................................................................ 85
512Mb: 32 Meg x 16, 16 Meg x 32 Mobile SDRAM
Features
PDF: 09005aef82ea3742
512mb_mobile_sdram_y47m.pdf – Rev. H 12/09 EN 3Micron Technology, Inc. reserves the right to change products or specifications without notice.
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