LM3S1968 Datasheet, PDF (650/709 Pages) List of Unclassifed Manufacturers – Microcontroller

Signal Tables
Table 19-8. GPIO Pins and Alternate Functions (continued)
IO
Pin Number
Multiplexed Function
PH3
D10
Fault
Multiplexed Function
19.3
Connections for Unused Signals
Table 19-9 on page 650 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 19-9. Connections for Unused Signals (100-pin LQFP)
Function
ADC
GPIO
Hibernate
No Connects
System Control
Signal Name
ADC0
ADC1
ADC2
ADC3
ADC4
ADC5
ADC6
ADC7
All unused GPIOs
HIB
VBAT
WAKE
XOSC0
XOSC1
NC
OSC0
OSC1
RST
Pin Number
1
2
5
6
100
99
96
95
-
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
5-1 on page 173
to GND as close to pin as
possible
Table 19-10 on page 651 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.
650
July 15, 2014
Texas Instruments-Production Data