LM3S601 Datasheet, PDF (75/446 Pages) List of Unclassifed Manufacturers – Microcontroller

LM3S601 Microcontroller
Bit/Field
9:6
5:4
3
2
1
Name
XTAL
OSCSRC
IOSCVER
MOSCVER
IOSCDIS
Type
R/W
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
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
0x8
0x9
0xA
0xB
0xC
0xD
0xE
0xF
Crystal Frequency (MHz) Crystal Frequency (MHz)
Not Using the PLL
Using the PLL
1.000
reserved
1.8432
reserved
2.000
reserved
2.4576
reserved
3.579545 MHz
3.6864 MHz
4 MHz
4.096 MHz
4.9152 MHz
5 MHz
5.12 MHz
6 MHz (reset value)
6.144 MHz
7.3728 MHz
8 MHz
8.192 MHz
0x0
Oscillator Source
Picks among the four input sources for the OSC. The values are:
Value Input Source
0x0 Main oscillator (default)
0x1 Internal oscillator (default)
0x2 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.
0
Internal Oscillator Disable
0: Internal oscillator (IOSC) is enabled.
1: Internal oscillator is disabled.
October 01, 2007
75
Preliminary