LM3S5737 Datasheet, PDF (766/833 Pages) Texas Instruments – Stellaris® LM3S5737 Microcontroller

Signal Tables
19.1
Connections for Unused Signals
Table 19-5 on page 766 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 19-5. 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 171
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
766
November 17, 2011
Texas Instruments-Production Data