TM4C123AH6PM Datasheet, PDF (244/1226 Pages) Texas Instruments – This data sheet provides reference information for the TM4C123AH6PM microcontroller, describing

System Control
Bit/Field
5:4
3:1
0
Name
OSCSRC
reserved
MOSCDIS
Type
R/W
RO
R/W
Reset
0x1
0x0
1
Description
Oscillator Source
Selects the input source for the OSC. The values are:
Value Input Source
0x0 MOSC
Main oscillator
0x1 PIOSC
Precision internal oscillator
(default)
0x2 PIOSC/4
Precision internal oscillator / 4
0x3 LFIOSC
Low-frequency internal oscillator
For additional oscillator sources, see the RCC2 register.
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
Main Oscillator Disable
Value Description
1 The main oscillator is disabled (default).
0 The main oscillator is enabled.
244
July 17, 2013
Texas Instruments-Production Data