Atmel SAM4L Xplained Pro Evaluation Kit Atmel ATSAM4L-XPRO ATSAM4L-XPRO Data Sheet

Product codes
ATSAM4L-XPRO
Page of 1204
886
42023E–SAM–07/2013
ATSAM4L8/L4/L2
32.7.1
Control Register
Name:
CR
Access Type:
Read/Write
Offset:
0x00
Reset Value:
0x00000000 
• FS: Sampling Frequency
Must be set to the matching data sampling frequency, see 
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.
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
5
4
3
2
1
0
SWRST
-
MONO
CMOC
ALTUPR
-
SWAP
EN
Table 32-3.
Generic Clock Requirements
CR.FS
Description
GCLK (CR.ALTUPR=1)
GCLK (CR.ALTUPR=0)
0
8000Hz sampling frequency
8.0MHz
8.1920MHz
1
11025Hz sampling frequency
12.0MHz
11.2896MHz
2
12000Hz sampling frequency
12.0MHz
12.2880MHz
3
16000Hz sampling frequency
16.0MHz
16.3840MHz
4
22050Hz sampling frequency
24.0MHz
22.5792MHz
5
24000Hz sampling frequency
24.0MHz
24.5760MHz
6
32000Hz sampling frequency
32.0MHz
32.7680MHz
7
44100Hz sampling frequency
48.0MHz
45.1584MHz
8
48000Hz sampling frequency
48.0MHz
49.1520MHz
Other
Reserved
-
-