Datasheet

 2017 Microchip Technology Inc. DS60001516A-page 289
SAM9G20
25.9.12 PMC Programmable Clock Register
Name:PMC_PCKx
Access:Read/Write
CSS: Master Clock Selection
PRES: Programmable Clock Prescaler
31 30 29 28 27 26 25 24
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23 22 21 20 19 18 17 16
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15 14 13 12 11 10 9 8
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76543210
––– PRES CSS
CSS Clock Source Selection
0 0 Slow Clock is selected
0 1 Main Clock is selected
1 0 PLL A Clock is selected
1 1 PLL B 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
111Reserved