LM3S6911 Luminary Micro, Inc, LM3S6911 Datasheet - Page 467
LM3S6911
Manufacturer Part Number
LM3S6911
Description
Lm3s6911 Arm Microcontroller
Manufacturer
Luminary Micro, Inc
Datasheet
1.LM3S6911.pdf
(502 pages)
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20.2.4
20.2.5
July 26, 2008
I
Table 20-12. I
a. Values depend on the value programmed into the TPR bit in the I
b. Because I2CSCL and I2CSDA are open-drain-type outputs, which the controller can only actively drive Low, the time
c. Specified at a nominal 50 pF load.
Figure 20-2. I
Ethernet Controller
Table 20-13. 100BASE-TX Transmitter Characteristics
a. Measured at the line side of the transformer.
Parameter
Parameter No.
Parameter Name
Peak output amplitude
Output amplitude symmetry
Output overshoot
Rise/Fall time
Rise/Fall time imbalance
Duty cycle distortion
Jitter
2
C
programmed for the maximum I2CSCL frequency (TPR=0x2) results in a minimum output timing as shown in the table
above. The I
period. The actual position is affected by the value programmed into the TPR; however, the numbers given in the above
values are minimum values.
I2CSCL or I2CSDA takes to reach a high level depends on external signal capacitance and pull-up resistor values.
A
LR
I2CSDA
I1
I2
I3
I4
I5
I6
I7
I8
I9
I2CSCL
a
a
b
a
c
a
a
a
a
Parameter Name
Absolute accuracy low range
2
Parameter
2
2
C interface is designed to scale the actual data transition time to move it to the middle of the I2CSCL Low
C Timing
C Characteristics
I1
t
t
t
SCSR
t
t
SCH
t
t
t
t
SRT
SFT
SCS
DH
HT
DS
LP
Parameter Name
Start condition hold time
Clock Low period
I2CSCL/I2CSDA rise time (V
Data hold time
I2CSCL/I2CSDA fall time (V
Clock High time
Data setup time
Start condition setup time (for repeated start condition
only)
Stop condition setup time
0.98
Min
950
3
-
-
-
-
I2
Nom
-
-
-
-
-
-
-
1050
Max
1.02
500
1.4
5
5
-
I4
Min
-
Preliminary
mVpk
mVpk
Unit
ns
ps
ps
ns
%
Nom
-
Max
±1/4
I6
IH
IL
=2.4 V to V
=0.5 V to V
I7
Unit
LSB
2
C Master Timer Period (I2CMTPR) register; a TPR
a
IL
IH
=0.5 V)
=2.4 V)
I5
I8
Min
36
36
24
18
36
24
2
-
-
Nom
I3
9
-
-
-
-
-
-
-
-
LM3S6911 Microcontroller
(see note b)
Max
10
-
-
-
-
-
-
-
system clocks
system clocks
system clocks
system clocks
system clocks
system clocks
system clocks
Unit
I9
ns
ns
467
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