V
DD
* VTT is not applied directly to the device, however tVTD must be
greater than or equal to zero to avoid device latchup.
V
DDQ
** tMRD is required before any command can be applied and
200 cycles of CK are required before a Read command can be applied.
t
VTD
The two Autorefresh commands may be moved to follow the first MRS,
but precede the second Precharge All command.
V
(System*)
TT
V
REF
t
CK
200 cycles of CK**
t
CH
t
t
t
t
t
t
MRD
200µs
MRD
MRD
RP
RFC
RFC
t
CL
CK
CK
t
t
IH
t
t
IS
IS
LVCMOS LOW LEVEL
CKE
IH
NOP
PRE
EMRS
MRS
PRE
AR
AR
MRS
ACT
Command
DM
t
IH
t
IS
CODE
CODE
CODE
CODE
CODE
RA
RA
BA
A0-A9, A11
A10
t
t
t
IH
IH
IH
t
t
t
IS
IS
IS
CODE
ALL BANKS
ALL BANKS
t
IH
t
IS
BA0=L
BA1=L
BA0=L
BA1=L
BA0=H
BA1=L
BA0, BA1
DQS
High-Z
High-Z
DQ
Power-up:
DD and CK
stable
Extended Mode
Register Set
Load Mode
Register, Reset DLL
Load Mode
Register
(with A8 = L)
Don’t Care
V
IBM [ IBM ]
