W9464G6IH Datasheet, PDF (38/54 Pages) Winbond – 1M × 4 BANKS × 16 BITS DDR SDRAM

W9464G6IH
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
tDQSH
tDQSL
tDQSH
tWPST
tWPRE
Preamble
tDS
tDH
Postamble
tDS
tDS
tDH
tDH
tDQSS
tWPRES
DDAA0
0
DA1
tDSH
DDAA2
2
tDSS
DDAA3
3
tDSH
tDSS
tDQSH
tDQSL
tDQSH
tWPST
tWPRE
Preamble
tDS
tDH
Postamble
tDS
tDS
tDH
tDH
DDAA0
0
DD1AA1
DD2AA2
DD3AA3
tDQSS
tDSH
tDSS
tDSH
tDSS
tWPRES
tDQSH
tDQSL
tDQSH
tWPST
tWPRE
Preamble
tDS
tDH
tDS
tDH
tDS Postamble
tDH
tDQSS
DD0AA0
DD1AA1
DD2AA2
DD3AA3
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:Mar. 17, 2010
Revision A04