Datasheet

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
--------
76543210
----OSC1ENOSC0EN MCSEL
MCSEL Selected Clock
0b00 Slow Clock
0b01 Oscillator 0
0b10 PLL 0
0b11 Reserved