Datasheet

AS4C32M16D1A-C&I
49 Rev. 1.0 Mar. /2015
Figure 34. Auto Refresh Mode
CK
CK
A0-A9
A11,A12
VALID
NOP
t
IS
Don’t Care
t
IH
NOP
AR NOP
AR
NOP
NOP
ACT
t
IS
t
IH
t
CH
t
CL
t
CK
RA
CKE
RA
A10
BA0,BA1
DQS
DQ
*Bank(s)
VALID
NOP PRE
RA
ALL BANKS
ONE BANKS
BA
t
IH
t
IS
DM
t
RP
t
RFC
t
RFC
* = “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
COMMAND