at91sam9g20-cu ATMEL Corporation, at91sam9g20-cu Datasheet - Page 307

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

26.9.12
Register Name:PMC_PCKx
Access Type:Read-write
• CSS: Master Clock Selection
• PRES: Programmable Clock Prescaler
6384B–ATARM–15-Dec-08
31
23
15
–
–
–
7
–
PMC Programmable Clock Register
0
0
0
0
1
1
1
1
0
0
1
1
30
22
14
–
–
–
6
–
CSS
29
21
13
–
–
–
5
–
PRES
0
0
1
1
0
0
1
1
0
1
0
1
28
20
12
–
–
–
4
Clock Source Selection
Slow Clock is selected
Main Clock is selected
PLL A Clock is selected
PLL B Clock is selected
PRES
27
19
11
–
–
–
3
AT91SAM9G20 Preliminary
0
1
0
1
0
1
0
1
26
18
10
–
–
–
2
Programmable Clock
Selected clock
Selected clock divided by 2
Selected clock divided by 4
Selected clock divided by 8
Selected clock divided by 16
Selected clock divided by 32
Selected clock divided by 64
Reserved
25
17
–
–
–
9
1
CSS
24
16
–
–
–
8
0
307