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SAM4S [DATASHEET]
11100E–ATARM–24-Jul-13
• PCKx: Programmable Clock x Output Enable
0 = No effect.
1 = Enables the corresponding Programmable Clock output.
28.2.16.2PMC System Clock Disable Register 
Name:
PMC_SCDR
Address:
0x400E0404
Access:
Write-only 
This register can only be written if the WPEN bit is cleared in 
.
• UDP: USB Device Port Clock Disable
0 = No effect.
1 = Disables the 48 MHz clock (UDPCK) of the USB Device Port.
• PCKx: Programmable Clock x Output Disable
0 = No effect.
1 = Disables the corresponding Programmable Clock output.
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
PCK2
PCK1
PCK0
7
6
5
4
3
2
1
0
UDP