General Notes .............................................................................................................................................. 9
I
DD
Specifications – Single Die, Single Channel ................................................................................................ 10
Simplified State Diagram ................................................................................................................................ 19
Power-Up and Initialization ............................................................................................................................ 21
Voltage Ramp and Device Initialization ....................................................................................................... 21
Initialization After RESET (Without Voltage Ramp) ...................................................................................... 23
Mode Register Assignments and Definitions ................................................................................................ 24
Commands and Timing .................................................................................................................................. 35
Write Data Mask ............................................................................................................................................. 50
READ Burst Followed by PRECHARGE ......................................................................................................... 52
WRITE Burst Followed by PRECHARGE ....................................................................................................... 53
Auto Precharge operation ........................................................................................................................... 54
READ Burst with Auto Precharge ................................................................................................................. 54
WRITE Burst with Auto Precharge ............................................................................................................... 55
Temperature Sensor ................................................................................................................................... 71
ZQ External Resistor Value, Tolerance, and Capacitive Loading ..................................................................... 78
Input Clock Frequency Changes and Stop Events ............................................................................................. 78
Input Clock Frequency Changes and Clock Stop with CKE LOW ................................................................... 78
Input Clock Frequency Changes and Clock Stop with CKE HIGH .................................................................. 78
NO OPERATION Command ............................................................................................................................ 79
Truth Tables ................................................................................................................................................... 79
Absolute Maximum Ratings ............................................................................................................................ 87
X26P4QTWDSPK-13-10166
134b_2e0e_embedded_lpddr2 – Rev. B 09/16 EN
3
Micron Technology, Inc. reserves the right to change products or specifications without notice.
Input Signal ............................................................................................................................................... 95
AC and DC Logic Input Measurement Levels for Differential Signals ................................................................. 97
Single-Ended Requirements for Differential Signals ..................................................................................... 98
Differential Input Crosspoint Voltage ......................................................................................................... 100
Clock Period Jitter .......................................................................................................................................... 113
Clock Period Jitter Effects on Core Timing Parameters ................................................................................. 113
Cycle Time Derating for Core Timing Parameters ........................................................................................ 114
Clock Cycle Derating for Core Timing Parameters ....................................................................................... 114
Clock Jitter Effects on Command/Address Timing Parameters ..................................................................... 114
Clock Jitter Effects on READ Timing Parameters .......................................................................................... 114
Clock Jitter Effects on WRITE Timing Parameters ........................................................................................ 115
AC Timing ..................................................................................................................................................... 116
CA and CS_n Setup, Hold, and Derating .......................................................................................................... 122
Data Setup, Hold, and Slew Rate Derating ....................................................................................................... 130
Revision History ............................................................................................................................................ 137
Rev. B – 09/16 ............................................................................................................................................ 137
Rev. A – 02/16 ............................................................................................................................................ 137
X26P4QTWDSPK-13-10166
134b_2e0e_embedded_lpddr2 – Rev. B 09/16 EN
4
Micron Technology, Inc. reserves the right to change products or specifications without notice.
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