TM4C1294NCZAD Datasheet, PDF (275/1914 Pages) Texas Instruments – Tiva Microcontroller

Tiva^™ TM4C1294NCZAD Microcontroller
Bit/Field
2
1
0
Name
NOXTAL
MOSCIM
CVAL
Type
RW
RW
RW
Reset
1
Description
No MOSC/Crystal Connected
Provides the user control over the power drawn from the main oscillator
circuit. This bit should be set when either crystal or single-ended mode
is being used.
If the application needs MOSC, this bit should be cleared.
Value Description
0 This bit should be cleared when a crystal or oscillator is
connected to the OSC0 and OSC1 inputs, regardless of whether
or not the MOSC is used or powered down.
Note:
For proper clock functionality when switching to
crystal mode, software must clear this bit and set the
PWRDN bit in a single write access.
1 This bit should be set when a crystal or external oscillator is not
connected to the OSC0 and OSC1 inputs to reduce power
consumption.
0
MOSC Failure Action
Value Description
0 If the MOSC fails, a MOSC failure reset is generated and reboots
to the NMI handler.
1 If the MOSC fails, an interrupt is generated as indicated by the
MOSRIS bit in the RIS register.
Regardless of the action taken, if the MOSC fails, the oscillator source
is switched to the PIOSC automatically.
0
Clock Validation for MOSC
Value Description
0 The MOSC monitor circuit is disabled.
1 The MOSC monitor circuit is enabled.
June 18, 2014
275
Texas Instruments-Production Data