EM6AB080
EtronTech
Figure 32. Initialize and Mode Register Sets
VDD
VDDQ
tVDT>=0
VTT
(system*)
VREF
tCK
tCH tCL
CK
CK
tIS tIH
CKE
tIS tIH
MRS
ACT
AR
AR
MRS
PRE
PRE
EMRS
NOP
COMMAND
DM
tIS tIH
A0-A9,
A11,A12
CODE
CODE
CODE
CODE
CODE
RA
RA
BA
ALL BANKS
tIS tIH
ALL BANKS
A10
CODE
tIS tIH
t
IS tIH
tIS tIH
BA0=H
BA1=L
BA0=L
BA1=L
BA0=L
BA1=L
BA0,BA1
High-Z
DQS
DQ
High-Z
**tMRD
**tMRD
tRP
200 cycles of CK**
tRFC
tRFC
**tMRD
T=200µs
Extended mode
Register set
Load Mode
Register,
(with A8=L)
Power-up:
VDD and
CLK stable
Load Mode
Register,
Reset DLL (with A8=H)
*=VTT is not applied directly to the device, however tVTD must be greater than or equal to zero to avoid device latch-up
**=tMRD is required before any command can be applied, and 200 cycles of CK are required before any executable command can be applied
The two Auto Refresh commands may be moved to follow the first MRS but precede the second PRECHARGE ALL command
Don’t Care
Etron Confidential
50
Rev.1.1
Dec. /2013
ETRON [ ETRON TECHNOLOGY, INC. ]
