W9412G6JH Datasheet, PDF (37/53 Pages) Winbond – 2M  4 BANKS  16 BITS DDR SDRAM

W9412G6JH
11.4 Write Timing (Burst Length = 4)
CLK
tCH
tCL
tCK
CLK
CMD
tIS tIH
WRIT
ADD
tIS tIH
Col
tDSH
tDSS
tDSH
tDSS
x4, x8 device
DQS
Input
(Data)
x16 device
LDQS
DQ0~7
UDQS
DQ8~15
tWPRES
tWPRE
tDQSH
Preamble
tDS
tDH
tDQSL
tDQSH
tWPST
tDS
tDH
Postamble
tDS
tDH
DA0
DA1
DA2
DA3
tDQSS
tWPRES
tWPRE
tDSH
tDQSH
tDSS
tDQSL
tDSH
tDQSH
tDSS
tWPST
Preamble
tDS
tDH
tDQSS
DA0
DA1
tDS
tDH
Postamble
tDS
tDH
DA2
DA3
tWPRES
tWPRE
tDSH
tDQSH
tDSS
tDQSL
tDSH
tDQSH
tDSS
tWPST
Preamble
tDS
tDH
tDS
tDH
tDS ^Postamble
tDH
DA0
tDQSS
DA1
DA2
DA3
Note: x16 has two DQSs (UDQS for upper byte and LDQS for lower byte). Even if one of the 2 bytes is not used, both UDQS
and LDQS must be toggled.
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Publication Release Date: Nov. 29, 2011
Revision A03