LM3S5D51 Datasheet, PDF (1183/1266 Pages) Texas Instruments – Stellaris® LM3S5D51 Microcontroller

Stellaris^® LM3S5D51 Microcontroller
Table 23-11. Possible Pin Assignments for Alternate Functions (continued)
# of Possible Assignments
six
seven
eight
nine
Alternate Function
CCP4
IDX0
PWM0
PWM1
PhB0
U1Rx
U1Tx
CCP5
USB0PFLT
CCP1
PWM4
PWM5
CCP0
CCP2
CCP3
Fault0
GPIO Function
PC7 PC4 PA7 PF7 PE2 PD5
PD0 PG5 PB2 PB6 PB4 PD7
PD0 PJ0 PG2 PG0 PA6 PF0
PD1 PG3 PG1 PA7 PF1 PJ1
PC7 PC6 PF7 PF0 PH3 PE3
PD0 PD2 PC6 PA0 PB0 PB4
PD1 PD3 PC7 PA1 PB1 PB5
PE5 PD2 PC4 PG7 PG5 PB6 PB5
PC7 PC6 PA7 PB3 PE0 PH4 PJ1
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
23.3
Connections for Unused Signals
Table 23-12 on page 1183 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
Hibernate
No Connects
System
Control
USB
Signal Name
All unused GPIOs
HIB
VBAT
WAKE
XOSC0
XOSC1
NC
OSC0
OSC1
RST
USB0DM
USB0DP
USB0RBIAS
Pin Number
-
51
55
50
52
53
-
48
49
64
70
71
73
Acceptable Practice
NC
NC
NC
NC
NC
NC
NC
NC
NC
Pull up as shown in Figure
5-1 on page 188
NC
NC
Connect to GND through
10-kΩ resistor.
Preferred Practice
GND
NC
GND
GND
GND
NC
NC
GND
NC
Connect through a capacitor to
GND as close to pin as possible
GND
GND
Connect to GND through 10-kΩ
resistor.
January 23, 2012
Texas Instruments-Production Data
1183