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WM8753LEB/RV датащи(PDF) 67 Page - Wolfson Microelectronics plc

номер детали WM8753LEB/RV
подробное описание детали  HI FI AND TELEPHONY DUAL CODEC
PDF  87 Pages
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производитель  WOLFSON [Wolfson Microelectronics plc]
домашняя страница  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8753LEB/RV датащи(HTML) 67 Page - Wolfson Microelectronics plc

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WM8753L
Advanced Information
w
AI Rev 3.1 June 2004
67
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
8:5
PLL1N
1000
Integer (N) part of PLL1 input/output
frequency ratio. Use values greater
than 5 and less than 13.
R54 (36h)
PLL1 Control (2)
3:0
PLL1K [21:18]
0011
R55 (37h)
PLL1 Control (3)
8:0
PLL1K [17:9]
024h
R56 (38h)
PLL1 Control (4)
8:0
PLL1K [8:0]
1Bah
Fractional
(K)
part
of
PLL1
input/output frequency ratio (treat as
one 22-digit binary number).
Table 63 PLL1 Frequency Ratio Control
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
8:5
PLL2N
1000
Integer (N) part of PLL2 input/output
frequency ratio. Use values greater
than 5 and less than 13.
R58 (3Ah)
PLL2 Control (2)
3:0
PLL2K [21:18]
0011
R59 (3Bh)
PLL2 Control (2)
8:0
PLL2K [17:9]
024h
R60 (3Ch)
PLL2 Control (3)
8:0
PLL2K [8:0]
1Bah
Fractional
(K)
part
of
PLL2
input/output frequency ratio (treat as
one 22-digit binary number)
Table 64 PLL2 Frequency Ratio Control
The PLL performs best when f2 is around 90MHz. Its stability peaks at N=8. Some example settings
are shown below.
MCLK
(MHz)
(F1)
DESIRED
OUTPUT
(MHz)
F2
(MHz)
MCLK
DIV2
PLL
OUT
DIV2
CLK
OUT
DIV2
R
N
(Hex)
K
(Hex)
11.91
11.2896
90.3168
0
1
0
7.5833
7
25545F
11.91
12.288
98.304
0
1
0
8.2539
8
103FF8
12
11.2896
90.3168
0
1
0
7.5264
7
21B08A
12
12.288
98.304
0
1
0
8.192
8
C49BA
13
11.2896
90.3168
0
1
0
6.9474
6
3CA2F5
13
12.288
98.304
0
1
0
7.5618
7
23F54A
14.4
11.2896
90.3168
0
1
0
6.272
6
116873
14.4
12.288
98.304
0
1
0
6.8267
6
34E81B
19.2
11.2896
90.3168
1
1
0
9.408
9
1A1CAC
19.2
12.288
98.304
1
1
0
10.24
A
F5C29
19.68
11.2896
90.3168
1
1
0
9.1785
9
B6D25
19.68
12.288
98.304
1
1
0
9.9902
9
3F6028
19.8
11.2896
90.3168
1
1
0
9.1229
9
7DDBE
19.8
12.288
98.304
1
1
0
9.9297
9
3B8028
24
11.2896
90.3168
1
1
0
7.5264
7
21B08A
24
12.288
98.304
1
1
0
8.192
8
C49BA
26
11.2896
90.3168
1
1
0
6.9474
6
3CA2F5
26
12.288
98.304
1
1
0
7.5618
7
23F54A
27
11.2896
90.3168
1
1
0
6.6901
6
2C2B25
27
12.288
98.304
1
1
0
7.2818
7
1208A6
Table 65 PLL Frequency Examples



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