LM3S1601 Datasheet, PDF (539/587 Pages) Texas Instruments – ARM and Thumb are registered trademarks and Cortex is a trademark

Stellaris^® LM3S1601 Microcontroller
Table 16-8. GPIO Pins and Alternate Functions (continued)
IO
Pin Number
Multiplexed Function
PH3
D10
Multiplexed Function
16.3
Connections for Unused Signals
Table 16-9 on page 539 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 16-9. Connections for Unused Signals (100-pin LQFP)
Function
GPIO
Hibernate
No Connects
System Control
Signal Name
All unused GPIOs
HIB
VBAT
WAKE
XOSC0
XOSC1
NC
OSC0
OSC1
RST
Pin Number
-
51
55
50
52
53
-
48
49
64
Acceptable Practice
Preferred Practice
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 164
GND as close to pin as possible
Table 16-10 on page 539 show how to handle signals for functions that are not used in a particular
system implementation for devices that are in a 108-pin BGA 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 16-10. Connections for Unused Signals, 108-pin BGA
Function
GPIO
Hibernate
No Connects
System Control
Signal Name
All unused GPIOs
HIB
VBAT
WAKE
XOSC0
XOSC1
NC
OSC0
OSC1
RST
Pin Number
-
M12
L12
M10
K11
K12
-
L11
M11
H11
Acceptable Practice
Preferred Practice
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 164
GND as close to pin as possible
June 19, 2012
539
Texas Instruments-Production Data