
MCIMX31/MCIMX31L Technical Data, Rev. 4.1
52
Freescale Semiconductor
Electrical Characteristics
Figure 37. SDRAM Self-Refresh Cycle Timing Diagram
NOTE
The clock will continue to run unless both CKEs are low. Then the clock will
be stopped in low state.
Table 37. SDRAM Self-Refresh Cycle Timing Parameters
ID
Parameter
Symbol
Min
Max
Unit
SD16
CKE output delay time
tCKS
1.8
—
ns
SDCLK
CS
CAS
RAS
ADDR
BA
WE
CKE
Don’t care
SD16
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:
i.MX31
Product
Family