AT32UC3L064-D3HES ATMEL [ATMEL Corporation], AT32UC3L064-D3HES Datasheet - Page 166

• Manufacturer Part Number: AT32UC3L064-D3HES
• Manufacturer: ATMEL [ATMEL Corporation]

13.7.1
Name:
Access Type:
Offset:
Reset Value:
• MCSEL: Main Clock Select
Table 13-7.
Note:
Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Please ref-
ere to the UNLOCK register description for details.
32099D–06/2010
MCSEL[2:0]
31
23
15
7
-
-
-
-
1. If the 120MHz RC oscillator is selected as main clock source, it must be divided by at least 4 before being used as clock
0
1
2
3
Main Clock Control
source for the CPU. This division is selected by writing to the CPUSEL and CPUDIV bits in the CPUSEL register, before
switching to RC120M as main clock source.
Main clocks in AT32UC3L.
30
22
14
6
-
-
-
-
MCCTRL
Read/Write
0x000
0x00000000
System RC oscillator (RCSYS)
120MHz RC oscillator
Main clock source
Oscillator0 (OSC0)
(RC120M)
DFLL
29
21
13
5
-
-
-
-
(1)
28
20
12
4
-
-
-
-
27
19
11
3
-
-
-
-
26
18
10
2
-
-
-
AT32UC3L016/32/64
MCSEL
25
17
9
1
-
-
-
24
16
8
0
-
-
-
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