Datasheet

190
SAM7X Series [DATASHEET]
6120K–ATARM–11-Feb-14
25.9.11 PMC Programmable Clock Register
Register Name: PMC_PCKx
Access Type: Read-write
• CSS: Master Clock Selection
• PRES: Programmable 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
––––––––
76543210
– – – PRES CSS
CSS Clock Source Selection
0 0 Slow Clock is selected
0 1 Main Clock is selected
10Reserved
1 1 PLL Clock is selected
PRES Programmable 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