EM6AB080
EtronTech
Figure 37. Read with Auto Precharge
tCK
tCH tCL
CK
CK
tIH
tIS
tIH
CKE
VALID
NOP
VALID
NOP
VALID
NOP
tIS tIH
NOP
NOP
ACT
RA
NOP
READ
NOP
NOP
COMMAND
A0-A9
tIS tIH
Col n
A11,A12
A10
RA
RA
EN AP
tIS tIH
tIS
tIH
Bank X
Bank X
BA0,BA1
CL=3
tRP
DM
Case 1:
tAC/tDQSCK=min
tDQSCK
tRPST
min
tRPRE
DQS
DQ
tLZ
min
DO
n
tLZ
tAC
min
min
Case 2:
tDQSCK
t
AC/tDQSCK=max
tRPST
max
tRPRE
DQS
DQ
tLZ
tHZ
max
max
DO
n
tLZ
tAC
max
max
DO n = Data Out from column n
Burst Length = 4 in the case shown
3 subsequent elements of Data Out are provided in the programmed order following DO n
EN AP = Enable Autoprecharge
ACT = ACTIVE, RA = Row Address
NOP commands are shown for ease of illustration; other commands may be valid at these times
The READ command may not be issued until tRAP has been satisfied. If Fast Autoprecharge is supported, tRAP = tRCD, else the READ
may not be issued prior to tRASmin (BL*tCK/2)
Don’t Care
Etron Confidential
55
Rev.1.1
Dec. /2013
ETRON [ ETRON TECHNOLOGY, INC. ]
