SAM3SD8C Atmel Corporation, SAM3SD8C Datasheet - Page 469

• Manufacturer Part Number: SAM3SD8C
• Manufacturer: Atmel Corporation

25.1.16.7
Name:
Address:
Access:
This register can only be written if the WPEN bit is cleared in
• KEY: Password
Should be written at value 0x37. Writing any other value in this field aborts the write operation.
• 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 startup 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.
• 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 startup time is achieved.
469
469
31
23
15
–
7
–
SAM3S8/SD8
SAM3S8/SD8
PMC Clock Generator Main Oscillator Register
CKGR_MOR
0x400E0420
Read-write
30
22
14
–
6
MOSCRCF
29
21
13
–
5
28
20
12
–
4
MOSCXTST
KEY
“PMC Write Protect Mode Register”
MOSCRCEN
27
19
11
–
3
26
18
10
–
2
–
MOSCXTBY
CFDEN
.
25
17
9
1
11090A–ATARM–10-Feb-12
11090A–ATARM–10-Feb-12
MOSCXTEN
MOSCSEL
24
16
8
0