LM3S5D91 Datasheet, PDF (1251/1340 Pages) Texas Instruments – Stellaris® LM3S5D91 Microcontroller

Stellaris^® LM3S5D91 Microcontroller
Table 23-11. Possible Pin Assignments for Alternate Functions (continued)
# of Possible Assignments
seven
eight
nine
ten
Alternate Function
CCP4
CCP5
USB0PFLT
PWM4
PWM5
CCP1
CCP3
Fault0
CCP0
CCP2
GPIO Function
PC7 PC4 PA7 PF7 PJ4 PE2 PD5
PE5 PD2 PC4 PG7 PG5 PB6 PB5
PC7 PC6 PA7 PB3 PE0 PH4 PJ1
PE6 PG0 PA2 PA6 PF2 PH6 PE0 PH0
PE7 PH7 PG1 PA3 PA7 PF3 PE1 PH1
PC5 PC4 PA6 PF6 PJ6 PB1 PB6 PE3 PD7
PE4 PC6 PC5 PA7 PG4 PF1 PB2 PE0 PD4
PE4 PG3 PG2 PJ2 PF4 PB3 PE1 PH3 PD6
PD3 PC7 PC6 PJ2 PJ7 PF4 PB0 PB2 PB5 PD4
PE4 PD1 PC4 PF5 PJ5 PB1 PE1 PB5 PE2 PD5
23.3
Connections for Unused Signals
Table 23-12 on page 1251 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 23-12. Connections for Unused Signals (100-Pin LQFP)
Function
GPIO
No Connects
System Control
Signal Name
All unused GPIOs
NC
OSC0
OSC1
RST
USB
USB0DM
USB0DP
USB0RBIAS
Pin Number
Acceptable Practice
Preferred Practice
-
NC
GND
-
NC
NC
48
NC
GND
49
NC
NC
64
Pull up as shown in Figure Connect through a capacitor to
5-1 on page 191
GND as close to pin as possible
70
NC
GND
71
NC
GND
73
Connect to GND through 10-kΩ Connect to GND through 10-kΩ
resistor.
resistor.
Table 23-13 on page 1251 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 23-13. Connections for Unused Signals (108-Ball BGA)
Function
GPIO
No Connects
Signal Name
All unused GPIOs
NC
Pin Number
-
-
Acceptable Practice
NC
NC
Preferred Practice
GND
NC
January 22, 2012
Texas Instruments-Production Data
1251