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WM8994ECS/R データシート(PDF) 235 Page - Cirrus Logic

部品番号 WM8994ECS/R
部品情報  Multi-channel Audio Hub CODEC for Smartphones
PDF  363 Pages
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メーカー  CIRRUS [Cirrus Logic]
ホームページ  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

WM8994ECS/R データシート(HTML) 235 Page - Cirrus Logic

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WM8994
Rev 4.6
235
POWER MANAGEMENT
The WM8994 has control registers that allow users to select which functions are active. For minimum
power consumption, unused functions should be disabled. To minimise pop or click noise, it is
important to enable or disable functions in the correct order. See
“Control Write Sequencer” for details
of recommended control sequences.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R1 (0001h)
Power
Management
(1)
13
SPKOUTR_ENA
0
SPKMIXR Mixer, SPKRVOL PGA and
SPKOUTR Output Enable
0 = Disabled
1 = Enabled
12
SPKOUTL_ENA
0
SPKMIXL Mixer, SPKLVOL PGA and
SPKOUTL Output Enable
0 = Disabled
1 = Enabled
11
HPOUT2_ENA
0
HPOUT2 and HPOUT2MIX Enable
0 = Disabled
1 = Enabled
9
HPOUT1L_ENA
0
Enables HPOUT1L input stage
0 = Disabled
1 = Enabled
8
HPOUT1R_ENA
0
Enables HPOUT1R input stage
0 = Disabled
1 = Enabled
5
MICB2_ENA
0
Microphone Bias 2 Enable
0 = Disabled
1 = Enabled
4
MICB1_ENA
0
Microphone Bias 1 Enable
0 = Disabled
1 = Enabled
2:1
VMID_SEL
[1:0]
00
VMID Divider Enable and Select
00 = VMID disabled (for OFF mode)
01 = 2 x 40k
 divider (Normal mode)
10 = 2 x 240k
 divider (Standby mode)
11 = Reserved
0
BIAS_ENA
0
Enables the Normal bias current
generator (for all analogue functions)
0 = Disabled
1 = Enabled



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