SAM7X256_14 Datasheet, PDF (190/662 Pages) ATMEL Corporation – ARM-based Flash MCU

25.9.11 PMC Programmable Clock Register
Register Name:
PMC_PCKx
Access Type:
Read-write
31
30
29
28
–
–
–
–
23
22
21
20
–
–
–
–
15
14
13
12
–
–
–
–
7
6
5
4
–
–
–
• CSS: Master Clock Selection
CSS
0
0
0
1
1
0
1
1
• PRES: Programmable Clock Prescaler
PRES
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
27
26
–
–
19
18
–
–
11
10
–
–
3
2
PRES
25
24
–
–
17
16
–
–
9
8
–
–
1
0
CSS
Clock Source Selection
Slow Clock is selected
Main Clock is selected
Reserved
PLL Clock is selected
Programmable Clock
0
Selected clock
1
Selected clock divided by 2
0
Selected clock divided by 4
1
Selected clock divided by 8
0
Selected clock divided by 16
1
Selected clock divided by 32
0
Selected clock divided by 64
1
Reserved
SAM7X Series [DATASHEET]
6120K–ATARM–11-Feb-14
190