at91sam9g20-cu ATMEL Corporation, at91sam9g20-cu Datasheet - Page 302

• Manufacturer Part Number: at91sam9g20-cu
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

26.9.8
Register Name:CKGR_MCFR
Access Type:Read-only
• MAINF: Main Clock Frequency
Gives the number of Main Clock cycles within 16 Slow Clock periods.
• MAINRDY: Main Clock Ready
0 = MAINF value is not valid or the Main Oscillator is disabled.
1 = The Main Oscillator has been enabled previously and MAINF value is available.
302
31
23
15
–
–
7
AT91SAM9G20 Preliminary
PMC Clock Generator Main Clock Frequency Register
30
22
14
–
–
6
29
21
13
–
–
5
28
20
12
–
–
4
MAINF
MAINF
27
19
11
–
–
3
26
18
10
–
–
2
25
17
–
–
9
1
6384B–ATARM–15-Dec-08
MAINRDY
24
16
–
8
0