LM3S817 Datasheet, PDF (175/553 Pages) List of Unclassifed Manufacturers – Microcontroller

Stellaris^® LM3S817 Microcontroller
Bit/Field
9:6
5:4
3
2
Name
XTAL
OSCSRC
IOSCVER
MOSCVER
Type
R/W
R/W
R/W
R/W
Reset
0xB
Description
Crystal Value
This field specifies the crystal value attached to the main oscillator. The
encoding for this field is provided below.
Value Crystal Frequency (MHz) Not Crystal Frequency (MHz) Using
Using the PLL
the PLL
0x0
1.000
reserved
0x1
1.8432
reserved
0x2
2.000
reserved
0x3
2.4576
reserved
0x4
3.579545 MHz
0x5
3.6864 MHz
0x6
4 MHz
0x7
4.096 MHz
0x8
4.9152 MHz
0x9
5 MHz
0xA
5.12 MHz
0xB
6 MHz (reset value)
0xC
6.144 MHz
0xD
7.3728 MHz
0xE
8 MHz
0xF
8.192 MHz
0x0
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
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.
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.
July 14, 2014
175
Texas Instruments-Production Data