SAM4L Datasheet, PDF (881/1185 Pages) ATMEL Corporation – ATSAM ARM-based Flash MCU

ATSAM4L4/L2
32.7.1 Control Register
Name:
CR
Access Type:
Read/Write
Offset:
0x00
Reset Value:
0x00000000
31
30
29
28
27
26
25
24
-
-
-
-
FS
23
22
21
20
19
18
17
16
-
-
-
-
-
DATAFORMAT
15
14
13
12
11
10
9
8
-
-
-
-
-
-
-
-
7
6
SWRST
-
5
4
3
2
MONO
CMOC
ALTUPR
-
1
0
SWAP
EN
• FS: Sampling Frequency
Must be set to the matching data sampling frequency, see Table 32-3.
Table 32-3.
CR.FS
0
1
2
3
4
5
6
7
8
Other
Generic Clock Requirements
Description
8000Hz sampling frequency
11025Hz sampling frequency
12000Hz sampling frequency
16000Hz sampling frequency
22050Hz sampling frequency
24000Hz sampling frequency
32000Hz sampling frequency
44100Hz sampling frequency
48000Hz sampling frequency
Reserved
GCLK (CR.ALTUPR=1)
8.0 MHz
12.0 MHz⁽¹⁾
12.0 MHz
16.0 MHz
24.0 MHz⁽¹⁾
24.0 MHz
32.0 MHz
48.0 MHz⁽¹⁾
48.0 MHz
-
GCLK (CR.ALTUPR=0)
8.1920 MHz
11.2896 MHz
12.2880 MHz
16.3840 MHz
22.5792 MHz
24.5760 MHz
32.7680 MHz
45.1584 MHz
49.1520 MHz
-
Note:
1. The actual clock requirement are 11.9952MHz, 23.9904MHz, and 47.9808MHz, but this is
very close to the suggested clock frequencies, and will only result in a very small frequency
shift. This need to be accounted for during testing if comparing to a reference signal.
Notes: 1.
42023C–SAM–02/2013
881