LM3S3749 Datasheet, PDF (824/898 Pages) Texas Instruments – Stellaris® LM3S3749 Microcontroller

Signal Tables
Table 21-4. GPIO Pins and Alternate Functions (continued)
IO
Pin Number
Multiplexed Function
PG6
37
PWM6
PG7
36
PWM7
PH0
86
PWM2
PH1
85
PWM3
PH2
84
Fault3
PH3
83
USB0EPEN
PH4
76
USB0PFLT
Multiplexed Function
21.1
Connections for Unused Signals
Table 21-5 on page 824 show how to handle signals for functions that are not used in a particular
system implementation for devices that are in a 100-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 21-5. Connections for Unused Signals (100-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
-
51
55
50
52
53
-
48
49
64
73
70
71
Acceptable Practice
NC
NC
NC
NC
NC
NC
NC
NC
NC
Pull up as shown in Figure
5-1 on page 177
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
824
November 17, 2011
Texas Instruments-Production Data