LM3S1651 Datasheet, PDF (968/1033 Pages) Texas Instruments – ARM and Thumb are registered trademarks and Cortex is a trademark

Signal Tables
Table 21-11. Possible Pin Assignments for Alternate Functions (continued)
# of Possible Assignments
seven
eight
nine
Alternate Function
CCP5
CCP1
PWM4
PWM5
CCP0
CCP2
CCP3
Fault0
GPIO Function
PE5 PD2 PC4 PG7 PG5 PB6 PB5
PC5 PC4 PA6 PF6 PB1 PB6 PE3 PD7
PE6 PG0 PA2 PA6 PF2 PH6 PE0 PH0
PE7 PH7 PG1 PA3 PA7 PF3 PE1 PH1
PD3 PC7 PC6 PJ2 PF4 PB0 PB2 PB5 PD4
PE4 PD1 PC4 PF5 PB1 PE1 PB5 PE2 PD5
PE4 PC6 PC5 PA7 PG4 PF1 PB2 PE0 PD4
PE4 PG3 PG2 PJ2 PF4 PB3 PE1 PH3 PD6
21.3
Connections for Unused Signals
Table 21-12 on page 968 shows 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 21-12. 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 183
GND as close to pin as possible
Table 21-13 on page 968 shows how to handle signals for functions that are not used in a particular
system implementation for devices that are in a 108-ball 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 21-13. Connections for Unused Signals (108-Ball BGA)
Function
GPIO
Signal Name
All unused GPIOs
Pin Number
-
Acceptable Practice
NC
Preferred Practice
GND
968
January 21, 2012
Texas Instruments-Production Data