Atmel Evaluation Kit for the SAM4E Series of Flash Microcontrollers ATSAM4E-EK ATSAM4E-EK Data Sheet
Product codes
ATSAM4E-EK
SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
606
30.17.7 PMC Clock Generator Main Oscillator Register
Name:
CKGR_MOR
Address:
0x400E0420
Access:
Read/Write
This register can only be written if the WPEN bit is cleared in
.
MOSCXTEN: Main Crystal Oscillator Enable
A crystal must be connected between XIN and XOUT.
0: The Main Crystal Oscillator is disabled.
1: The Main Crystal Oscillator is enabled. MOSCXTBY must be set to 0.
When MOSCXTEN is set, the MOSCXTS flag is set once the Main Crystal Oscillator start-up time is achieved.
MOSCXTBY: Main Crystal Oscillator Bypass
0: No effect.
1: The Main Crystal Oscillator is bypassed. MOSCXTEN must be set to 0. An external clock must be connected on XIN.
When MOSCXTBY is set, the MOSCXTS flag in PMC_SR is automatically set.
Clearing MOSCXTEN and MOSCXTBY bits allows resetting the MOSCXTS flag.
WAITMODE: Wait Mode Command
0: No effect.
1: Enters the device in Wait Mode.
Note: The WAITMODE bit is write-only.
MOSCRCEN: Main On-Chip RC Oscillator Enable
0: The Main On-Chip RC Oscillator is disabled.
1: The Main On-Chip RC Oscillator is enabled.
When MOSCRCEN is set, the MOSCRCS flag is set once the Main On-Chip RC Oscillator start-up time is achieved.
31
30
29
28
27
26
25
24
–
–
–
–
–
–
CFDEN
MOSCSEL
23
22
21
20
19
18
17
16
KEY
15
14
13
12
11
10
9
8
MOSCXTST
7
6
5
4
3
2
1
0
–
MOSCRCF
MOSCRCEN
WAITMODE
MOSCXTBY
MOSCXTEN