72 / 502 page
Description
Reset
Type
Name
Bit/Field
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
0
RO
reserved
10
Crystal Value
This field specifies the crystal value attached to the main oscillator. The
encoding for this field is provided below.
Crystal Frequency (MHz) Using
the PLL
Crystal Frequency (MHz) Not
Using the PLL
Value
reserved
1.000
0x0
reserved
1.8432
0x1
reserved
2.000
0x2
reserved
2.4576
0x3
3.579545 MHz
0x4
3.6864 MHz
0x5
4 MHz
0x6
4.096 MHz
0x7
4.9152 MHz
0x8
5 MHz
0x9
5.12 MHz
0xA
6 MHz (reset value)
0xB
6.144 MHz
0xC
7.3728 MHz
0xD
8 MHz
0xE
8.192 MHz
0xF
0xB
R/W
XTAL
9:6
Oscillator Source
Picks among the four input sources for the OSC. The values are:
Input Source
Value
Main oscillator (default)
0x0
Internal oscillator (default)
0x1
Internal oscillator / 4 (this is necessary if used as input to PLL)
0x2
reserved
0x3
0x1
R/W
OSCSRC
5:4
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
0x0
RO
reserved
3:2
Internal Oscillator Disable
0: Internal oscillator (IOSC) is enabled.
1: Internal oscillator is disabled.
0
R/W
IOSCDIS
1
September 02, 2007
72
Preliminary
System Control
Korean ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
