Datasheet

Voltage Initialization / Change
If the SDRAM is powered up and initialized for the 1.35V operating voltage range, volt-
age can be increased to the 1.5V operating range provided the following conditions are
met (See Figure 47 (page 129)):
• Just prior to increasing the 1.35V operating voltages, no further commands are issued,
other than NOPs or COMMAND INHIBITs, and all banks are in the precharge state.
• The 1.5V operating voltages are stable prior to issuing new commands, other than
NOPs or COMMAND INHIBITs.
• The DLL is reset and relocked after the 1.5V operating voltages are stable and prior to
any READ command.
• The ZQ calibration is performed.
t
ZQinit must be satisfied after the 1.5V operating
voltages are stable and prior to any READ command.
If the SDRAM is powered up and initialized for the 1.5V operating voltage range, voltage
can be reduced to the 1.35V operation range provided the following conditions are met
(See Figure 47 (page 129)) :
• Just prior to reducing the 1.5V operating voltages, no further commands are issued,
other than NOPs or COMMAND INHIBITs, and all banks are in the precharge state.
• The 1.35V operating voltages are stable prior to issuing new commands, other than
NOPs or COMMAND INHIBITs.
• The DLL is reset and relocked after the 1.35V operating voltages are stable and prior to
any READ command.
• The ZQ calibration is performed.
t
ZQinit must be satisfied after the 1.35V operating
voltages are stable and prior to any READ command.
8Gb: x4, x8, x16 DDR3L SDRAM
Voltage Initialization / Change
128
Rev 2.0 June 2016
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