Datasheet

485
SAM4S [DATASHEET]
11100E–ATARM–24-Jul-13
28.2.16.12PMC 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 Protect 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