LM3S310 Luminary Micro, Inc, LM3S310 Datasheet - Page 79

• Manufacturer Part Number: LM3S310
• Description: Lm3s310 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

July 5, 2006
Oscillator-Related Bits
Bit/Field
5:4
1:0
3
2
Table 6-3. PLL Mode Control
Table 6-4. Default Crystal Field Values and PLL Programming
MOSCVER
IOSCVER
OSCSRC
PWRDN
reserved
Name
(XTAL Binary Value)
1
0
Crystal Number
0000-0011
0100
0101
0110
1000
1001
1010
0111
Type
R/W
R/W
R/W
RO
OEN
X
0
Reset
reserved
3.579545 MHz
3.6864 MHz
4 MHz
4.096 MHz
4.9152 MHz
5 MHz
5.12 MHz
0x0
Mode
Power down
Normal
0
0
0
Preliminary
Crystal Frequency (MHz)
Description
Picks among the four input sources for the OSC. The
values are:
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.
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.
Reserved bits return an indeterminate value, and should
never be changed.
This bit controls the internal oscillator verification timer
This bit controls the main oscillator verification timer
Value
00
01
10
11
Input Source
Main oscillator (default)
Internal oscillator
Internal oscillator / 4 (this is necessary if used
as input to PLL)
reserved
LM3S310 Data Sheet
79