EM6AB160
EtronTech
Figure 41. Bank Write Access
tCK
tCH tCL
CK
CK
tIS
tIH
CKE
tIS tIH
WRITE
Col n
NOP
NOP
PRE
NOP
NOP
NOP
ACT
NOP
NOP
COMMAND
A0-A9
tIS tIH
RA
RA
RA
A11,A12
tIS tIH
ALL BANKS
A10
DIS AP
ONE BANK
*Bank X
tIS tIH
Bank X
Bank X
BA0,BA1
tRAS
tRCD
tWR
Case 1:
tDQSS=min
tDSH
tDQSH
tDSH
tWPST
tDQSS
DQS
tWPRES
tWPRE
tDQSL
DI
n
DQ
DM
tDSS
Case 2:
tDSS
tWPST
tDQSH
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 Out 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
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
Precharge may not be issued before tRAS ns after the ACTIVE command for applicable banks
Rev.1.3
59
Jun. /2015
ETRON [ ETRON TECHNOLOGY, INC. ]
