WM8753 Wolfson Microelectronics plc, WM8753 Datasheet - Page 67

• Manufacturer Part Number: WM8753
• Description: HI FI AND TELEPHONY DUAL CODEC
• Manufacturer: Wolfson Microelectronics plc

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