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2Gb: x16, x32 Mobile LPDDR2 SDRAM S4
Burst READ Command
Figure 34: t DQSCKDM Timing
Tn
Tn + 1
Tn + 2
Tn + 3
Tn + 4
Tn + 5
Tn + 6
Tn + 7
Tn + 8
CK#
CK
RL = 5
CA
[9:0]
Bank n
col addr
Col addr
CMD
READ
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
t DQSCKn
DQS#
DQS
DQ
D OUT A0
D OUT A1
D OUT A2
D OUT A3
1.6μs maximum…
1
Tm
Tm + 1
Tm + 2
Tm + 3
Tm + 4
Tm + 5
Tm + 6
Tm + 7
Tm + 8
CK#
CK
RL = 5
CA
[9:0]
Bankn
col addr
Col addr
CMD
READ
NOP
NOP
NOP
NOP
NOP
NOP
NOP
NOP
t DQSCKm
DQS#
DQS
DQ
D OUT A0
D OUT A1
D OUT A2
D OUT A3
…1.6μs maximum
1
Notes:
Transitioning data
1. t DQSCKDM = ( t DQSCK n - t DQSCK m ).
2. t DQSCKDM (MAX) is defined as the maximum of ABS ( t DQSCK n - t DQSCK m ) for any
( t DQSCK n , t DQSCK m ) pair within any 1.6 μ s rolling window.
PDF: 09005aef83f3f2eb
2gb_mobile_lpddr2_s4_g69a.pdf – Rev. N 3/12 EN
59
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