Datasheet

526
SAM4S Series [DATASHEET]
11100F–ATARM–29-Jan-14
29.17.12PMC USB Clock Register
Name: PMC_USB
Address: 0x400E0438
Access: Read/Write
This register can only be written if the WPEN bit is cleared in “PMC Write Protection Mode Register” .
• USBS: USB Input Clock Selection
0: USB Clock Input is PLLA.
1: USB Clock Input is PLLB
• USBDIV: Divider for USB Clock
USB Clock is Input clock divided by USBDIV+1.
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
––––––––
15 14 13 12 11 10 9 8
–––– USBDIV
76543210
–––––––USBS