WM8903 Datasheet, PDF (106/178 Pages) Wolfson Microelectronics plc – Ultra Low Power CODEC for Portable Audio Applications

WM8903
Production Data
EXAMPLE FLL SETTINGS
Table 70 provides example FLL settings for generating common CLK_SYS frequencies from a variety
of low and high frequency reference inputs.
F_REF
32.000
kHz
32.000
kHz
32.768
kHz
32.768
kHz
32.768
kHz
48
kHz
11.3636
MHz
12.000
MHz
12.000
MHz
12.288
MHz
12.288
MHz
13.000
MHz
13.000
MHz
19.200
MHz
19.200
MHz
F_OUT
12.288
MHz
11.2896
MHz
12.288
MHz
11.288576
MHz
11.2896
MHz
12.288
MHz
12.368544
MHz
12.288
MHz
11.289597
MHz
12.288
MHz
11.2896
MHz
12.287990
MHz
11.289606
MHz
12.287988
MHz
11.289588
MHz
FLL_CLK_
REF_DIV
Divide by 1
(0h)
Divide by 1
(0h)
Divide by 1
(0h)
Divide by 1
(0h)
Divide by 1
(0h)
Divide by 1
(0h)
Divide by 1
(0h)
Divide by 1
(0h)
Divide by 1
(0h)
Divide by 1
(0h)
Divide by 1
(0h)
Divide by 1
(0h)
Divide by 1
(0h)
Divide by 2
(1h)
Divide by 2
(1h)
Table 70 Example FLL Settings
F_VCO
98.304
MHz
90.3168
MHz
98.304
MHz
90.3086
MHz
90.3168
MHz
98.304
MHz
98.9484
MHz
98.304
MHz
90.3168
MHz
98.304
MHz
90.3168
MHz
98.3039
MHz
90.3168
MHz
98.3039
MHz
90.3167
MHz
FLL_N
192
(0C0h)
176
(0B0h)
187
(0BBh)
172
(0ACh)
172
(0ACh)
128
(080h)
8
(008h)
8
(008h)
7
(007h)
8
(008h)
7
(007h)
7
(007h)
6
(006h)
10
(00Ah)
9
(009h)
FLL_K
0
(0000h)
0.4
(6666h)
0.5
(8000h)
0.25
(4000h)
0.2656
(4400h)
0
(0000h)
0.707483
(B51Eh)
0.192
(3127h)
0.526398
(86C2h)
0
(0000h)
0.35
(599Ah)
0.56184
(8FD5h)
0.94745
(F28Ch)
0.23999
(3D70h)
0.40799
(6872h)
FLL_
FRATIO
16
(4h)
16
(4h)
16
(4h)
16
(4h)
16
(4h)
16
(4h)
1
(0h)
1
(0h)
1
(0h)
1
(0h)
1
(0h)
1
(0h)
1
(0h)
1
(0h)
1
(0h)
FLL_
OUTDIV
8
(2h)
8
(2h)
8
(2h)
8
(2h)
8
(2h)
8
(2h)
8
(2h)
8
(2h)
8
(2h)
8
(2h)
8
(2h)
8
(2h)
8
(2h)
8
(2h)
8
(2h)
FLL_
FRAC
0
1
1
1
1
0
1
1
1
0
1
1
1
1
1
w
PD, Rev 4.5, June 2012
106