EM68932DVKB
EtronTech
Figure 35. Auto Refresh Cycles Back-to-Back
CK
CK
tRP
tRFC
tRFC
PRE
NOP
ARF
NOP
NOP
ARF
NOP
NOP
ACT
Command
Address
Ba A,
Row n
Pre All
Row n
A10 (AP)
DQ
High-Z
Ba A, Row n = Bank A, Row n
Don’t Care
Figure 36. Self Refresh Entry and Exit
CK
CK
tRFC
tRP
tRFC
tXSR
CKE
PRE
NOP
ARF
NOP
NOP
NOP
ARF
NOP
ACT
Command
Ba A,
Row n
Address
Pre All
Row n
A10 (AP)
DQ
High-Z
Enter
Self Refresh
Mode
Exit From
Self Refresh
Mode
Any Command
(Auto Refresh
Recommended)
Don’t Care
Etron Confidential
39
Rev. 1.0
Aug. 2009