EM6AB160
EtronTech
Figure 40. Write with Auto Precharge
tCK
tCH tCL
CK
CK
tIS
tIH
CKE
VALID
NOP
VALID
NOP
VALID
NOP
tIS tIH
WRITE
NOP
NOP
ACT
RA
NOP
NOP
NOP
COMMAND
A0-A9
tIS tIH
Col n
A11,A12
RA
DIS AP
RA
BA
A10
tIS
tIH
Bank X
BA0,BA1
tDAL
Case 1:
tDQSS=min
tDSH
tDQSH
tDSH
tDQSS
tWPST
DQS
tWPRES
tWPRE
tDQSL
DI
n
DQ
DM
tDSS
tDQSH
tDSS
Case 2:
tDQSS=max
tDQSS
tWPST
DQS
tWPRES
tDQSL
tWPRE
DI
n
DQ
DM
DI n = Data In from column n
Burst Length = 4 in the case shown
3 subsequent elements of Data Out are provided in the programmed order following DI n
EN AP = Enable Autoprecharge
ACT = ACTIVE, RA = Row Address, BA = Bank Address
NOP commands are shown for ease of illustration; other commands may be valid at these times
Although tDQSS is drawn only for the first DQS rising edge, each rising edge of DQS must fall within the + 25%
window of the corresponding positive clock edge
Don’t Care
Rev.1.3
58
Jun. /2015