LM3S608-IQN50-C2 Datasheet, PDF (172/538 Pages) Texas Instruments – Stellaris LM3S608 Microcontroller

System Control
NRND: Not recommended for new designs.
Bit/Field
5:4
Name
OSCSRC
Type
R/W
Reset
0x0
Description
Oscillator Source
Selects the input source for the OSC. The values are:
Value Input Source
0x0 MOSC
Main oscillator (default)
0x1 IOSC
Internal oscillator
0x2 IOSC/4
Internal oscillator / 4 (this is necessary if used as input to PLL)
0x3 reserved
3
IOSCVER
R/W
0
Internal Oscillator Verification Timer
This bit controls the internal oscillator verification timer function. If set,
the verification timer is enabled and an interrupt is generated if the timer
becomes inoperative. Otherwise, the verification timer is not enabled.
2
MOSCVER
R/W
0
Main Oscillator Verification Timer
This bit controls the main oscillator verification timer function. If set, the
verification timer is enabled and an interrupt is generated if the timer
becomes inoperative. Otherwise, the verification timer is not enabled.
1
IOSCDIS
R/W
0
Internal Oscillator Disable
0: Internal oscillator (IOSC) is enabled.
1: Internal oscillator is disabled.
0
MOSCDIS
R/W
0
Main Oscillator Disable
0: Main oscillator is enabled (default).
1: Main oscillator is disabled .
Table 5-6. PLL Mode Control
PWRDN
1
0
OEN
X
0
Mode
Power down
Normal
172
June 18, 2012
Texas Instruments-Production Data