1Gb: x4, x8, x16 DDR3 SDRAM
Power-Down Mode
Figure 106: MRS Command to Power-Down Entry
T0
T1
T2
Ta0
Ta1
Ta2
Ta3
Ta4
CK#
CK
t
t
t
t
CPDED
CK
CH
CL
Command
Address
MRS
NOP
NOP
NOP
NOP
NOP
Valid
t
t
MRSPDEN
PD
t
IS
CKE
Indicates break
in time scale
Don’t Care
Figure 107: Power-Down Exit to Refresh to Power-Down Entry
T0
T1
T2
T3
T4
Ta0
Ta1
Tb0
NOP
CK#
CK
tCK
tCH
tCL
Command
NOP
NOP
NOP
NOP
REFRESH
NOP
tCPDED
tXP1
tIH
tIS
CKE
tIS
tPD
tXPDLL2
Enter power-down
mode
Enter power-down
mode
Exit power-down
mode
Indicates break
in time scale
Don’t Care
1. tXP must be satisfied before issuing the command.
Notes:
2. tXPDLL must be satisfied (referenced to the registration of power-down exit) before the
next power-down can be entered.
PDF: 09005aef826aa906
1Gb_DDR3_SDRAM.pdf - Rev. L 03/13 EN
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190
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