EM68B16DVAA
EtronTech
Figure 23. Basic Write Timing Parameters
tCK
tCH
tCL
CK
CK
tDSH
tDQSH
tDSH
Case 1:
tDQSS = min
tDQSS
tWPST
DQS
tWPRES
tDQSL
tWPRE
tDS
tDH
DI n
DQ, DM
tDSS
tDSS
tWPST
Case 2:
tDQSS = min
tDQSS
tDQSH
DQS
tWPRES
tDQSL
tWPRE
tDS
tDH
DI n
DQ, DM
Don’t Care
(1) DI n = Data In for column n
(2) 3 subsequent elements of Data In are applied in the programmed order following DI n.
(3) tDQSS: each rising edge of DQS must fall within the ±25% window of the corresponding positive clock edge.
Etron Confidential
30
Rev. 1.0
Mar. 2009