at91cap7e ATMEL Corporation, at91cap7e Datasheet - Page 231

• Manufacturer Part Number: at91cap7e
• Description: Customizable Microcontroller
• Manufacturer: ATMEL Corporation

24.2.10.7
Register Name:
Access Type:
• MOSCEN: Main Oscillator Enable
A crystal must be connected between XIN and XOUT.
0 = The Main Oscillator is disabled.
1 = The Main Oscillator is enabled. OSCBYPASS must be set to 0.
When MOSCEN is set, the MOSCS flag is set once the Main Oscillator startup time is achieved.
• OSCBYPASS: Oscillator Bypass
0 = No effect.
1 = The Main Oscillator is bypassed. MOSCEN must be set to 0. An external clock must be connected on XIN.
When OSCBYPASS is set, the MOSCS flag in PMC_SR is automatically set.
Clearing MOSCEN and OSCBYPASS bits allows resetting the MOSCS flag.
• OSCOUNT: Main Oscillator Start-up Time
Specifies the number of Slow Clock cycles multiplied by 8 for the Main Oscillator start-up time.
8549A–CAP–10/08
31
23
15
–
–
7
–
PMC Clock Generator Main Oscillator Register
30
22
14
–
–
6
–
CKGR_MOR
Read/Write
29
21
13
–
–
5
–
28
20
12
–
–
4
–
OSCOUNT
27
19
11
–
–
3
–
26
18
10
–
–
2
–
OSCBYPASS
25
17
–
–
9
1
AT91CAP7E
MOSCEN
24
16
–
–
8
0
231