Datasheet

 2017 Microchip Technology Inc. DS60001516A-page 277
SAM9G20
25.9.1 PMC System Clock Enable Register
Name:PMC_SCER
Access:Write-only
UHP: USB Host Port Clock Enable
0: No effect.
1: Enables the 12 and 48 MHz clock of the USB Host Port.
UDP: USB Device Port Clock Enable
0: No effect.
1: Enables the 48 MHz clock of the USB Device Port.
PCKx: Programmable Clock x Output Enable
0: No effect.
1: Enables the corresponding Programmable Clock output.
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
––––––PCK1PCK0
76543210
UDPUHP––––––