WM8978_06 Wolfson Microelectronics Ltd., WM8978_06 Datasheet - Page 83

• Manufacturer Part Number: WM8978_06
• Description: Stereo Codec With Speaker Driver
• Manufacturer: Wolfson Microelectronics Ltd.

Pre-Production
Table 61 PLL Frequency Examples
COMPANDING
w
MCLK
(MHZ)
19.68
19.68
14.4
14.4
19.2
19.2
19.8
19.8
(F1)
12
12
13
13
24
24
26
26
27
27
DESIRED
OUTPUT
12.288
12.288
12.288
12.288
12.288
12.288
12.288
12.288
12.288
(MHZ)
11.29
11.29
11.29
11.29
11.29
11.29
11.29
11.29
11.29
LOOPBACK
Setting the LOOPBACK register bit enables digital loopback. When this bit is set the output data
from the ADC audio interface is fed directly into the DAC data input.
The WM8978 supports A-law and -law and companding and linear mode on both transmit (ADC)
and receive (DAC) sides. Companding can be enabled on the DAC or ADC audio interfaces by
writing the appropriate value to the DAC_COMP or ADC_COMP register bits respectively.
90.3168
90.3168
90.3168
90.3168
90.3168
90.3168
90.3168
90.3168
90.3168
98.304
98.304
98.304
98.304
98.304
98.304
98.304
98.304
98.304
(MHZ)
F2
PRESCALE
DIVIDE
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
2
2
POSTSCALE
DIVIDE
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
6.947446
7.561846
6.826667
9.178537
9.990243
9.122909
9.929697
6.947446
7.561846
6.690133
7.281778
7.5264
7.5264
8.192
6.272
9.408
10.24
8.192
R
(HEX)
A
7
8
6
7
6
6
9
9
9
9
9
7
8
6
7
6
7
N
PP Rev 3.0 May 2006
WM8978
BOAC93
F28BD4
45A1CA
D3A06E
EE009E
F28BD4
86C226
8FD525
6872AF
3D70A3
2DB492
FD809F
86C226
8FD525
3126E8
1F76F7
3126E8
482296
(HEX)
K
83