Atmel Xplained Evaluation Board AT32UC3A3-XPLD AT32UC3A3-XPLD Data Sheet
Product codes
AT32UC3A3-XPLD
56
32072H–AVR32–10/2012
AT32UC3A3
7.6.1
Main Clock Control Register
Name: MCCTRL
Access Type:
Read/Write
Offset:
0x00
Reset Value:
0x00000000
• OSC1EN: Oscillator 1 Enable
1: Oscillator 1 is enabled
0: Oscillator 1 is disabled
• OSC0EN: Oscillator 0 Enable
1: Oscillator 0 is enabled
0: Oscillator 0 is disabled
• MCSEL: Main Clock Select
This field contains the clock selected as the main clock.
31
30
29
28
27
26
25
24
-
-
-
-
-
-
-
-
23
22
21
20
19
18
17
16
-
-
-
-
-
-
-
-
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
7
6
5
4
3
2
1
0
-
-
-
-
OSC1EN
OSC0EN
MCSEL
MCSEL
Selected Clock
0b00
Slow Clock
0b01
Oscillator 0
0b10
PLL 0
0b11
Reserved