Atmel Evaluation Kit AT91SAM9M10-G45-EK AT91SAM9M10-G45-EK Data Sheet
Product codes
AT91SAM9M10-G45-EK
353
SAM9M10 [DATASHEET]
6355F–ATARM–12-Mar-13
26.11.12 PMC Master Clock Register
Name:
PMC_MCKR
Address:
0xFFFFFC30
Access:
Read/Write
• CSS: Master/Processor Clock Source Selection
• PRES: Master/Processor Clock Prescaler
31
30
29
28
27
26
25
24
–
–
–
–
–
–
–
–
23
22
21
20
19
18
17
16
–
–
–
–
–
–
–
–
15
14
13
12
11
10
9
8
–
–
–
PLLADIV2
–
–
MDIV
7
6
5
4
3
2
1
0
–
–
–
PRES
CSS
CSS
Clock Source Selection
0
0
Slow Clock is selected.
0
1
Main Clock is selected.
1
0
PLLA Output clock is selected.
1
1
UPLL Output clock is selected.
PRES
Master/Processor Clock Dividers
Input Clock
Input Clock
0
0
0
Selected clock
0
0
1
Selected clock divided by 2
0
1
0
Selected clock divided by 4
0
1
1
Selected clock divided by 8
1
0
0
Selected clock divided by 16
1
0
1
Selected clock divided by 32
1
1
0
Selected clock divided by 64
1
1
1
Reserved