LM3S1636_13 Datasheet, PDF (606/655 Pages) Texas Instruments – Stellaris Microcontroller

Signal Tables
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18.5
Connections for Unused Signals
Table 18-5 on page 606 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 18-5. Connections for Unused Signals (100-pin LQFP)
Function
ADC
GPIO
Hibernate
No Connects
System Control
Signal Name
ADC0
ADC1
ADC2
ADC3
All unused GPIOs
HIB
VBAT
WAKE
XOSC0
XOSC1
NC
OSC0
OSC1
RST
Pin Number
1
2
5
6
-
51
55
50
52
53
-
48
49
64
Acceptable Practice
NC
Preferred Practice
GNDA
NC
GND
NC
NC
NC
GND
NC
GND
NC
GND
NC
NC
NC
NC
NC
GND
NC
NC
Pull up as shown in Figure Connect through a capacitor to
5-1 on page 168
GND as close to pin as possible
606
July 24, 2012
Texas Instruments-Production Data