EtronTech
EM6AA160
Figure 34. Auto Refresh Mode
tCK
tCH tCL
CK
CK
tIS
tIH
CKE
VALID
NOP
VALID
tIS tIH
NOP
ACT
RA
AR
AR
NOP
NOP
PRE
NOP
NOP
COMMAND
A0-A8
A9,A11,A12
A10
RA
RA
BA
ALL BANKS
ONE BANKS
tIS tIH
*Bank(s)
BA0,BA1
DQS
DQ
DM
tRFC
tRP
tRFC
* = Don't Care , if A10 is HIGH at this point; A10 must be HIGH if more than one bank is active (i.e., must precharge all active banks)
PRE = PRECHARGE, ACT = ACTIVE, RA = Row Address, BA = Bank Address, AR = AUTOREFRESH
NOP commands are shown for ease of illustration; other valid commands may be possible after tRFC
DM, DQ and DQS signals are all Don't Care /High-Z for operations shown
Don’t Care
Etron Confidential
53
Rev. 1.3
Mar. /2014
ETRON [ ETRON TECHNOLOGY, INC. ]
