EtronTech
EM68916CWQA
Figure 41. Write with autoprecharge to power-down entry
T0
T1
Tm
Tm+1
Tm+2
Tm+3
Tx
Tx+1
Tx+2
Tx+3
Tx+4
Tx+5
Tx+6
CK#
CK
CMD
CKE
WRA
PRE
BL=4
WL
tIS
Q
Q
Q
Q
DQ
WR*1
DQS
DQS#
T0
T1
Tm
Tm+1
Tm+2
Tm+3
Tm+4
Tm+5
Tx
Tx+1
PRE
Tx+2
Tx+3
Tx+4
CK#
CK
Start internal Precharge
CMD
CKE
WRA
BL=8
WL
tIS
Q
Q
Q
Q
Q
Q
Q
Q
DQ
WR*1
DQS
DQS#
*1: WR is programmed through MRS
Figure 42. Refresh command to power-down entry
T0
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
T11
CK#
CK
CMD
CKE
REF
CKE can go to LOW one clock after an Auto-refresh command
tIS
Figure 43. Active command to power-down entry
T0
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
T11
CMD
CKE
ACT
CKE can go to LOW one clock after an Active command
tIS
Etron Confidential
57
Rev. 1.1
Apr. 2009
ETRON [ ETRON TECHNOLOGY, INC. ]
