SAM4L Datasheet, PDF (467/1185 Pages) ATMEL Corporation – ATSAM ARM-based Flash MCU

19.6.14 Digital Tuner Register
Name:
DTR
Access Type:
Read/Write
Offset:
0x44
Reset Value:
0x00000000
ATSAM4L4/L2
31
30
29
28
27
26
25
24
-
-
-
-
-
-
-
-
23
22
21
20
19
18
17
16
-
-
-
-
-
-
-
-
15
14
13
12
11
10
9
8
VALUE
7
6
5
4
3
2
1
0
-
-
ADD
EXP
When the SR.BUSY bit is set writes to this register will be discarded and this register will read as zero.
• VALUE:
0: The frequency is unchanged.
1-255: The frequency will be adjusted according to the formula below.
•
ADD:
0: The resulting frequency i=s
⎛
⎞
⎜
f0⎜1
–
---------------------------------------¹----------------------------------------⎟⎟
for VALUE > 0 .
⎜
⎝
roundup_{⎝⎛V}-----_A²----_L⁵---⁶_U-----_E--_⎠⎞ ⋅ 2^(EXP) + 1_⎠⎟
⎛
⎞
1:
The
resulting
frequency =is
⎜
f0⎜
1
+
---------------------------------------¹---------------------------------------
⎟
⎟
for VALUE > 0 .
⎜
⎝
roundup_{⎝⎛V}-----_A-²---_L⁵---⁶_U-----_E--_⎠⎞ ⋅ 2^(EXP) – 1_⎠⎟
• EXP:
The frequency will be adjusted according to the formula above.
42023C–SAM–02/2013
467