LM3S5652 Datasheet, PDF (781/848 Pages) Texas Instruments – Stellaris® LM3S5652 Microcontroller

Stellaris® LM3S5652 Microcontroller
Table 20-4. GPIO Pins and Alternate Functions (continued)
IO
Pin Number
Multiplexed Function
PC5
14
USB0EPEN
PC6
15
USB0PFLT
PC7
16
CCP4
PD0
61
CAN0Rx
PD1
62
CAN0Tx
PD2
63
ADC5
PD3
64
ADC4
PE0
6
ADC3
PE1
5
ADC2
PE2
2
ADC1
PE3
1
ADC0
PE4
8
CCP2
Multiplexed Function
20.1
Connections for Unused Signals
Table 20-5 on page 781 shows how to handle signals for functions that are not used in a particular
system implementation for devices that are in a 64-pin LQFP package. Two options are shown in
the table: an acceptable practice and a preferred practice for reduced power consumption and
improved EMC characteristics. If a module is not used in a system, and its inputs are grounded, it
is important that the clock to the module is never enabled by setting the corresponding bit in the
RCGCx register.
Table 20-5. Connections for Unused Signals (64-pin LQFP)
Function
GPIO
Hibernate
No Connects
System
Control
USB
Signal Name
All unused GPIOs
HIB
VBAT
WAKE
XOSC0
XOSC1
NC
OSC0
OSC1
RST
USB0RBIAS
USB0DM
USB0DP
Pin Number
-
33
37
32
34
35
-
30
31
40
48
45
46
Acceptable Practice
NC
NC
NC
NC
NC
NC
NC
NC
NC
Pull up as shown in Figure
5-1 on page 175
Connect to GND through
10-kΩ resistor.
NC
NC
Preferred Practice
GND
NC
GND
GND
GND
NC
NC
GND
NC
Connect through a capacitor to
GND as close to pin as possible
Connect to GND through 10-kΩ
resistor.
GND
GND
November 17, 2011
781
Texas Instruments-Production Data