EtronTech
EM68C08CWAE
Figure 52. Read with autoprecharge to power-down entry
T0
T1
T2
Tx
Tx+1
Tx+2
Tx+3
Tx+4
Tx+5
Tx+6
Tx+7
Tx+8
Tx+9
CK#
CK
CMD
CKE
RDA
PRE
CKE should be kept HIGH until the end of burst operation
BL=4
AL+BL/2 with tRTP = 7.5ns
& tRAS min satisfied
AL+CL
Q
tIS
Q
Q
Q
DQ
DQS
DQS#
T0
T1
RD
T2
Tx
Tx+1
Tx+2
PRE
Tx+3
Tx+4
Tx+5
Tx+6
Tx+7
Tx+8
Tx+9
CK#
CK
Start internal precharge
CMD
CKE
CKE should be kept HIGH until the end of burst operation
BL=8
AL+BL/2 with tRTP = 7.5ns
& tRAS min satisfied
AL+CL
tIS
Q
Q
Q
Q
Q
Q
Q
Q
DQ
DQS
DQS#
Figure 53. Write to power-down entry
T0
T1
Tm
Tm+1
Tm+2
Tm+3
Tx
Tx+1
Tx+2
Ty
Ty+1
Ty+2
Ty+3
CK#
CK
CMD
CKE
WR
BL=4
WL
tIS
Q
Q
Q
Q
DQ
tWTR
DQS
DQS#
T0
T1
Tm
Tm+1
Tm+2
Tm+3
Tm+4
Tm+5
Tx
Tx+1
Tx+2
Tx+3
Tx+4
CK#
CK
CMD
CKE
WR
BL=8
WL
tIS
Q
Q
Q
Q
Q
Q
Q
Q
DQ
tWTR
DQS
DQS#
Rev. 1.3
59
Oct. /2015
ETRON [ ETRON TECHNOLOGY, INC. ]
