wm8351 Wolfson Microelectronics plc, wm8351 Datasheet - Page 97
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wm8351
Manufacturer Part Number
wm8351
Description
Wolfson Audioplus? Stereo Codec With Power Management
Manufacturer
Wolfson Microelectronics plc
Datasheet
1.WM8351.pdf
(328 pages)
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Production Data
w
8-bit mode is selected whenever DAC_COMP=1 or ADC_COMP=1. The use of 8-bit data allows
samples to be passed using as few as 8 BCLK cycles per LRCLK frame. When using DSP mode B,
8-bit data words may be transferred consecutively every 8 BCLK cycles.
8-bit mode (without Companding) may be enabled by setting ADC_COMPMODE=1 when
ADC_COMP=0.
Table 50 8-bit Companded Word Composition
Figure 39 μ-Law Companding
Figure 40 A-Law Companding
BIT7
SIG
N
120
100
80
60
40
20
120
100
0
80
60
40
20
0
0
0
0.1
0.2
EXPONENT
0.2
BIT[6:4]
0.3
A-law Companding
u-law Companding
0.4
Normalised Input
0.4
Normalised Input
0.5
0.6
0.6
0.7
MANTISSA
0.8
0.8
BIT[3:0]
0.9
PD, June 2009, Rev 4.1
1
1
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
WM8351
97
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