
MC94MX21 Technical Data, Rev. 1.
56
Freescale Semiconductor
Specifications
Table 36. SSI to SSI3 Ports Timing Parameters
Ref
No.
Parameter
1.8 V
± 0.1 V
3.0 V
± 0.3 V
Unit
Minimum
Maximum
Minimum
Maximum
Internal Clock Operation1 (SSI3 Ports)
1
(Tx/Rx) CK clock period1
90.91
–
90.91
–
ns
2
(Tx) CK high to FS (bl) high
-2.09
-0.66
-2.09
-0.66
ns
3
(Rx) CK high to FS (bl) high
-2.74
-0.84
-2.74
-0.84
ns
4
(Tx) CK high to FS (bl) low
-2.09
-0.66
-2.09
-0.66
ns
5
(Rx) CK high to FS (bl) low
-2.74
-0.84
-2.74
-0.84
ns
6
(Tx) CK high to FS (wl) high
-2.09
-0.66
-2.09
-0.66
ns
7
(Rx) CK high to FS (wl) high
-2.74
-0.84
-2.74
-0.84
ns
8
(Tx) CK high to FS (wl) low
-2.09
-0.66
-2.09
-0.66
ns
9
(Rx) CK high to FS (wl) low
-2.74
-0.84
-2.74
-0.84
ns
10
(Tx) CK high to STXD valid from high impedance
-1.73
-0.26
-1.73
-0.26
ns
11a
(Tx) CK high to STXD high
-2.87
-0.80
-2.87
-0.80
ns
11b
(Tx) CK high to STXD low
-2.87
-0.80
-2.87
-0.80
ns
12
(Tx) CK high to STXD high impedance
-1.73
-0.26
-1.73
-0.26
ns
13
SRXD setup time before (Rx) CK low
22.77
–
22.77
–
ns
14
SRXD hold time after (Rx) CK low
0
–
0
–
ns
External Clock Operation (SSI3 Ports)
15
(Tx/Rx) CK clock period1
90.91
–
90.91
–
ns
16
(Tx/Rx) CK clock high period
36.36
–
36.36
–
ns
17
(Tx/Rx) CK clock low period
36.36
–
36.36
–
ns
18
(Tx) CK high to FS (bl) high
9.62
17.10
7.90
15.61
ns
19
(Rx) CK high to FS (bl) high
10.30
19.54
8.58
18.05
ns
20
(Tx) CK high to FS (bl) low
9.62
17.10
7.90
15.61
ns
21
(Rx) CK high to FS (bl) low
10.30
19.54
8.58
18.05
ns
22
(Tx) CK high to FS (wl) high
9.62
17.10
7.90
15.61
ns
23
(Rx) CK high to FS (wl) high
10.30
19.54
8.58
18.05
ns
24
(Tx) CK high to FS (wl) low
9.62
17.10
7.90
15.61
ns
25
(Rx) CK high to FS (wl) low
10.30
19.54
8.58
18.05
ns
26
(Tx) CK high to STXD valid from high impedance
9.02
16.46
7.29
14.97
ns
27a
(Tx) CK high to STXD high
8.48
15.32
6.75
13.83
ns
27b
(Tx) CK high to STXD low
8.48
15.32
6.75
13.83
ns
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:
MC94MX21DVKN3