Input Clock Frequency Change ...................................................................................................................... 124
Write Leveling ............................................................................................................................................... 126
Write Leveling Procedure ........................................................................................................................... 128
Write Leveling Mode Exit Procedure ........................................................................................................... 130
Initialization ................................................................................................................................................. 131
Voltage Initialization / Change ....................................................................................................................... 133
V
DD
Voltage Switching ............................................................................................................................... 134
Mode Registers .............................................................................................................................................. 135
Mode Register 0 (MR0) ................................................................................................................................... 136
Burst Length ............................................................................................................................................. 136
Burst Type ................................................................................................................................................. 137
DLL RESET ................................................................................................................................................ 138
Write Recovery .......................................................................................................................................... 138
Precharge Power-Down (Precharge PD) ...................................................................................................... 139
CAS Latency (CL) ....................................................................................................................................... 139
Mode Register 1 (MR1) ................................................................................................................................... 140
DLL Enable/DLL Disable ........................................................................................................................... 140
Output Drive Strength ............................................................................................................................... 141
OUTPUT ENABLE/DISABLE ...................................................................................................................... 141
TDQS Enable ............................................................................................................................................. 141
On-Die Termination .................................................................................................................................. 142
WRITE LEVELING ..................................................................................................................................... 142
POSTED CAS ADDITIVE Latency ................................................................................................................ 142
Mode Register 2 (MR2) ................................................................................................................................... 143
CAS Write Latency (CWL) ........................................................................................................................... 144
AUTO SELF REFRESH (ASR) ....................................................................................................................... 144
SELF REFRESH TEMPERATURE (SRT) ........................................................................................................ 145
SRT vs. ASR ............................................................................................................................................... 145
DYNAMIC ODT ......................................................................................................................................... 145
Mode Register 3 (MR3) ................................................................................................................................... 146
MULTIPURPOSE REGISTER (MPR) ............................................................................................................ 146
MPR Functional Description ...................................................................................................................... 147
MPR Register Address Definitions and Bursting Order ................................................................................. 148
MPR Read Predefined Pattern .................................................................................................................... 154
MODE REGISTER SET (MRS) Command ........................................................................................................ 154
ZQ CALIBRATION Operation ......................................................................................................................... 155
ACTIVATE Operation ..................................................................................................................................... 156
READ Operation ............................................................................................................................................ 158
WRITE Operation .......................................................................................................................................... 169
DQ Input Timing ....................................................................................................................................... 177
PRECHARGE Operation ................................................................................................................................. 179
SELF REFRESH Operation .............................................................................................................................. 179
Extended Temperature Usage ........................................................................................................................ 181
Power-Down Mode ........................................................................................................................................ 182
RESET Operation
........................................................................................................................................... 190
On-Die Termination (ODT) ............................................................................................................................ 192
Functional Representation of ODT ............................................................................................................. 192
Nominal ODT ............................................................................................................................................ 192
Dynamic ODT ............................................................................................................................................... 194
Dynamic ODT Special Use Case ................................................................................................................. 194
Functional Description .............................................................................................................................. 194
Synchronous ODT Mode ................................................................................................................................ 200
4Gb: x4, x8, x16 DDR3L SDRAM
Description
PDF: 09005aef84780270
4Gb_DDR3L.pdf - Rev. I 9/13 EN
4
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