Datasheet
60
32117D–AVR-01/12
AT32UC3C
7.7.1 Main Clock Control
Name: MCCTRL
Access Type: Read/Write
Offset: 0x0000
Reset Value: 0x00000000
•
MCSEL: Main Clock Select
Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Please
refer to the UNLOCK register description for details.
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
----- MCSEL
Table 7-6. Main clocks in AT32UC3C.
MCSEL[1:0] Main clock source
0 System RC oscillator (RCSYS)
1 Oscillator 0
2 Oscillator 1
3PLL0
4PLL1
5 8 MHz RC oscillator (RC8M)
6reserved
7 120 MHz RC oscillator (RC120M)
others reserved