SAM4L Datasheet, PDF (522/1185 Pages) ATMEL Corporation – ATSAM ARM-based Flash MCU

22.6.2 Mode Register
Name:
MODE
Access Type:
Read/Write
Offset:
0x004
Reset Value:
0x00000000
ATSAM4L4/L2
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
• 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.
42023C–SAM–02/2013
522