LM3S6C11 Datasheet, PDF (773/828 Pages) Texas Instruments – Stellaris® LM3S6C11 Microcontroller

OBSOLETE: TI has discontinued production of this device.
Stellaris^® LM3S6C11 Microcontroller
Table 18-12. Connections for Unused Signals (100-Pin LQFP) (continued)
Function
Signal Name
Pin Number
Acceptable Practice
Preferred Practice
HIB
51
NC
NC
VBAT
55
NC
GND
Hibernate
WAKE
50
NC
GND
XOSC0
52
NC
GND
XOSC1
53
NC
NC
No Connects
NC
-
NC
NC
OSC0
48
NC
GND
System
Control
OSC1
RST
49
NC
NC
64
Pull up as shown in Figure Connect through a capacitor to
5-1 on page 171
GND as close to pin as possible
a. Note that the Ethernet PHY is powered up by default. The PHY cannot be powered down unless a clock source is provided
and the MDIO pin is pulled up through a 10-kΏ resistor.
Table 18-13 on page 773 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 18-13. Connections for Unused Signals (108-Ball BGA)
Function
Signal Name
Pin Number
Acceptable Practice
Preferred Practice
ERBIAS
J3
Connect to GND through
Connect to GND through
12.4-kΩ resistor.
12.4-kΩ resistor.
RXIN
L7
NC
GND
RXIP
M7
NC
Ethernet
TXON
L8
NC
GND
GND
TXOP
M8
NC
XTALNPHY^a
J1
NC
XTALPPHY^a
J2
NC
GND
NC
GND
GPIO
All unused GPIOs
-
NC
GND
HIB
M12
NC
NC
VBAT
L12
NC
GND
Hibernate
WAKE
M10
NC
GND
XOSC0
K11
NC
GND
XOSC1
K12
NC
NC
No Connects
NC
-
NC
NC
OSC0
L11
NC
GND
System
Control
OSC1
RST
M11
NC
NC
H11
Pull up as shown in Figure Connect through a capacitor to
5-1 on page 171
GND as close to pin as possible
a. Note that the Ethernet PHY is powered up by default. The PHY cannot be powered down unless a clock source is provided
and the MDIO pin is pulled up through a 10-kΏ resistor.
July 24, 2012
773
Texas Instruments-Production Data