
Figure 40: WRITE-to-READ – Odd Number of Data, Interrupting
tDQSS (NOM)
CK
CK#
Command1
WRITE2
NOP
Address
Bank a,
Col b
Bank a,
Col b
READ
T0
T1
T2
T3
T2n
T4
T5
T5n
T1n
T6
T6n
tWTR3
CL = 3
DQ5
DQS4
DM
tDQSS (MIN)
CL = 3
DQ5
DQS4
DM
tDQSS (MAX)
CL = 3
DQ5
DQS4
DM
Don’t Care
Transitioning Data
tDQSS
DIN
DOUT
DIN
Notes: 1. An interrupted burst of 4 is shown; 1 data element is written, 3 are masked.
2. A10 is LOW with the WRITE command (auto precharge is disabled).
3. tWTR is referenced from the first positive CK edge after the last data-in pair.
4. DQS is required at T2 and T2n (nominal case) to register DM.
5. DINb = data-in for column b; DOUTn = data-out for column n.
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512Mb: x16, x32 Mobile LPDDR SDRAM
WRITE Operation
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t67m_512mb_mobile_lpddr.pdf - Rev. B 2/10 EN
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