LM3S5632 Luminary Micro, Inc, LM3S5632 Datasheet - Page 635

• Manufacturer Part Number: LM3S5632
• Description: Lm3s5632 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

22.2.3
22.2.4
June 02, 2008
Analog-to-Digital Converter
Table 22-11. ADC Characteristics
a. The ADC reference voltage is 3.0 V. This reference voltage is internally generated from the 3.3 VDDA supply by a band
b. t
I
Table 22-12. 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.
Parameter
V
C
N
f
t
f
INL
DNL
OFF
GAIN
Parameter No.
2
ADC
ADCCONV
ADCCONV
ADCIN
ADCIN
C
ADC
gap circuit.
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.
= 1/f
I1
I2
I3
I4
I5
I6
I7
I8
I9
a
a
b
a
c
a
a
a
a
ADC clock
Parameter Name
Maximum single-ended, full-scale analog input voltage
Minimum single-ended, full-scale analog input voltage
Maximum differential, full-scale analog input voltage
Minimum differential, full-scale analog input voltage
Equivalent input capacitance
Resolution
ADC internal clock frequency
Conversion time
Conversion rate
Integral nonlinearity
Differential nonlinearity
Offset
Gain
2
Parameter
2
C interface is designed to scale the actual data transition time to move it to the middle of the I2CSCL Low
C Characteristics
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
a
Preliminary
IH
IL
=2.4 V to V
=0.5 V to V
2
C Master Timer Period (I2CMTPR) register; a TPR
Min
438
7
-
-
-
-
-
-
-
-
-
-
-
IL
IH
Nom
=0.5 V)
500
=2.4 V)
10
1
8
-
-
-
-
-
-
-
-
-
Max
-1.5
563
3.0
1.5
16
±1
±1
±1
±1
0
9
-
-
Min
36
36
24
18
36
24
2
-
-
V
V
V
V
pF
bits
MHz
t
k samples/s
LSB
LSB
LSB
LSB
ADC
Nom
Unit
cycles
9
-
-
-
-
-
-
-
-
LM3S5632 Microcontroller
(see note b)
b
Max
10
-
-
-
-
-
-
-
system clocks
system clocks
system clocks
system clocks
system clocks
system clocks
system clocks
Unit
ns
ns
635