EtronTech
EM6AA160
Figure 39. Write without Auto Precharge
tCK
tCH tCL
CK
CK
tIH
tIS
tIH
CKE
VALID
NOP
tIS tIH
WRITE
NOP
NOP
PRE
NOP
ACT
RA
NOP
NOP
NOP
COMMAND
A0-A8
tIS tIH
Col n
A9,A11,A12
A10
RA
RA
BA
tIS tIH
ALL BANKS
ONE BANKS
DIS AP
tIS tIH
Bank X
*Bank X
BA0,BA1
tRP
Case 1:
tDQSS=min
tDSH
tDQSH
tDSH
tDQSS
tWR
tWPST
DQS
tDQSL
tWPRES
tWPRE
DI
n
DQ
DM
tDSS
tDQSH
tDSS
tWPST
Case 2:
tDQSS=max
tDQSS
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 In are provided in the programmed order following DI n
DIS AP = Disable Autoprecharge
*= Don't Care , if A10 is HIGH at this point
PRE = PRECHARGE, ACT = ACTIVE, RA = Row Address, BA = Bank Address, AR = AUTOREFRESH
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
Precharge may not be issued before tRAS ns after the ACTIVE command for applicable banks
Don’t Care
Etron Confidential
58
Rev. 1.3
Mar. /2014
ETRON [ ETRON TECHNOLOGY, INC. ]
