Atmel SAM4S-XPLD Atmel ATSAM4S-XPLD ATSAM4S-XPLD Hoja De Datos
Los códigos de productos
ATSAM4S-XPLD
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
.
• 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
7
6
5
4
3
2
1
0
–
–
–
–
–
–
–
USBS