1Gb: x4, x8, x16 DDR3 SDRAM
Power-Down Mode
Figure 100: Power-Down Entry After READ or READ with Auto Precharge (RDAP)
T0
T1
Ta0
Ta1
Ta2
Ta3
Ta4
Ta5
Ta6
Ta7
Ta8
Ta9
Ta10
Ta11
Ta12
CK#
CK
READ/
RDAP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
Command
tIS
tCPDED
CKE
Address
Valid
tPD
RL = AL + CL
DQS, DQS#
DI
n
DI
DI
DI
DI
DI
DI
DI
DQ BL8
DQ BC4
n + 1 n + 2 n + 3 n + 4 n+ 5 n + 6 n + 7
DI
n
DI
DI
DI
n + 1 n + 2 n + 3
tRDPDEN
Power-down or
self refresh entry
Indicates break
in time scale
Transitioning Data
Don’t Care
Figure 101: Power-Down Entry After WRITE
T0
T1
Ta0
Ta1
Ta2
Ta3
Ta4
Ta5
Ta6
Ta7
Tb0
NOP
Tb1
Tb2
NOP
Tb3
Tb4
CK#
CK
WRITE
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
tIS
Command
tCPDED
CKE
Valid
Address
tWR
tPD
WL = AL + CWL
DQS, DQS#
DQ BL8
DI
DI
n
DI
DI
DI
DI
DI
DI
n + 7
n + 1 n + 2 n + 3 n + 4 n + 5 n + 6
DI
n
DI
DI
DI
DQ BC4
n + 1 n + 2 n + 3
tWRPDEN
Power-down or
self refresh entry1
Indicates break
in time scale
Transitioning Data
Don’t Care
1. CKE can go LOW 2tCK earlier if BC4MRS.
Note:
PDF: 09005aef826aa906
1Gb_DDR3_SDRAM.pdf - Rev. L 03/13 EN
Micron Technology, Inc. reserves the right to change products or specifications without notice.
187
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