Atmel SAM4L Xplained Pro Starter Kit Atmel ATSAM4L-XSTK ATSAM4L-XSTK Data Sheet
Product codes
ATSAM4L-XSTK
528
42023E–SAM–07/2013
ATSAM4L8/L4/L2
22.6.2
Mode Register
Name: MODE
Access Type:
Read/Write
Offset: 0x004
Reset Value:
0x00000000
• REFCEN: Reference Clock Enable
0: The reference clock is disabled
1: The reference clock is enabled
• CLKSEL: Clock Source Selection
Selects the source for CLK_MSR. See table in Module Configuration chapter for details.
• REFNUM: Number of Reference Clock Cycles
Selects the duration of a measurement, given in number of CLK_REF cycles.
• REFSEL: Reference Clock Selection
Selects the source for CLK_REF. See table in Module Configuration chapter for details.
31
30
29
28
27
26
25
24
REFCEN
-
-
-
-
-
-
-
23
22
21
20
19
18
17
16
-
-
-
CLKSEL
15
14
13
12
11
10
9
8
REFNUM
7
6
5
4
3
2
1
0
-
-
-
-
-
REFSEL