WM8941GEFL WOLFSON [Wolfson Microelectronics plc], WM8941GEFL Datasheet - Page 49
![no-image](/images/no-image-200.jpg)
WM8941GEFL
Manufacturer Part Number
WM8941GEFL
Description
Mono CODEC with Speaker Driver and Video Buffer
Manufacturer
WOLFSON [Wolfson Microelectronics plc]
Datasheet
1.WM8941GEFL.pdf
(96 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
WM8941GEFL
Manufacturer:
WOLFSON
Quantity:
20 000
- Current page: 49 of 96
- Download datasheet (2Mb)
Pre Production
w
Table 37 Mono Mixer Control
ENABLING THE OUTPUTS
Table 38 Output Stages Power Management Control
UNUSED ANALOGUE INPUTS/OUTPUTS
Each analogue output of the WM8941 can be separately enabled or disabled. The analogue mixer
associated with each output has a separate enable. All outputs are disabled by default. To save
power, unused parts of the WM8941 should remain disabled.
Outputs can be enabled at any time, but it is not recommended to do so when BUFIO is disabled
(BUFIOEN=0), as this may cause pop noise (see “POP Minimisation” section).
Whenever an analogue input/output is disabled, it remains connected to AVDD/2 through a resistor.
This helps to prevent pop noise when the output is re-enabled. The resistance between the voltage
buffer and the output pins can be controlled using the VROI control bit. The default impedance is
low, so that any capacitors on the outputs can charge up quickly at start-up. If a high impedance is
desired for disabled outputs, VROI can then be set to 1, increasing the resistance to about 30kΩ.
R56
Mono mixer
control
R1
Power
management 1
R3
Power
management 3
Note: All “Enable” bits are 1 = ON, 0 = OFF
REGISTER
ADDRESS
REGISTER
ADDRESS
3
2
7
6
5
3
2
BIT
BIT
7
6
2
1
0
BIASEN
BUFIOEN
MONOEN
SPKNEN
SPKPEN
MONOMIXEN 0
SPKMIXEN
MONOATTN
MONOMUTE
AUX2MONO
BYP2MONO
DAC2MONO
LABEL
LABEL
0
0
0
0
0
0
DEFAULT
DEFAULT
0
0
0
0
0
Analogue amplifiers bias enable
VMID buffer enable
MONOOUT enable
SPKOUTN enable
SPKOUTP enable
Mono mixer enable
Speaker Mixer enable
Attenuation control for bypass path
(output of input boost stage) to mono
mixer input
1 0 = 0dB
0 1 = -10dB
0=No mute
1=Output muted. During mute the
mono output will output VMID which can
be used as a DC reference for a
headphone out.
Output of Auxillary amplifier to mono
mixer input:
0 = not selected
1 = selected
Bypass path (output of input boost
stage) to mono mixer input
0 = non selected
1 = selected
Output of DAC to mono mixer input
0 = not selected
1 = selected
PP, Rev 3.3, December 2007
DESCRIPTION
DESCRIPTION
WM8941
49
Related parts for WM8941GEFL
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![wm8941](/images/no-image3.png)
Part Number:
Description:
Mono Codec With Speaker Driver And Video Buffer
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
![WM8351CGEB/RV](/images/no-image3.png)
Part Number:
Description:
Wolfson AudioPlus™ Stereo CODEC with Power Management
Manufacturer:
WOLFSON [Wolfson Microelectronics plc]
Datasheet:
![WM9701A](/images/no-image3.png)
Part Number:
Description:
WM9701ALow Power AC97 Multimedia Audio Codec
Manufacturer:
WOLFSON Wolfson Microelectronics plc
Datasheet:
![WM8973LGEFL](/images/no-image3.png)
Part Number:
Description:
WM8973LGEFLSTEREO CODEC FOR PORTABLE AUDIO APPLICATIONS
Manufacturer:
WOLFSON Wolfson Microelectronics plc
Datasheet:
![wm8350](/images/no-image3.png)
Part Number:
Description:
Wolfson Audioplus? Stereo Codec With Power Management
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
![wm8351](/images/no-image3.png)
Part Number:
Description:
Wolfson Audioplus? Stereo Codec With Power Management
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
![wm8352](/images/no-image3.png)
Part Number:
Description:
Wolfson Audioplus? Stereo Codec With Power Management
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
![wm2000](/images/no-image3.png)
Part Number:
Description:
Handset Receiver Speaker Driver With Wolfson Myzone Ambient Noise Cancellation
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
![wm2002](/images/no-image3.png)
Part Number:
Description:
Stereo Headphone Driver With Wolfson Myzonetm Ambient Noise Cancellation
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
![wm8400](/images/no-image3.png)
Part Number:
Description:
Wolfson Audioplustm Hi-fi Audio Codec And Power Management Unit For Mobile Multimedia
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
![WM9701A](/images/no-image3.png)
Part Number:
Description:
WM9701ALow Power AC97 Multimedia Audio Codec
Manufacturer:
WOLFSON Wolfson Microelectronics plc
Datasheet:
![WM8973LGEFL](/images/no-image3.png)
Part Number:
Description:
WM8973LGEFLSTEREO CODEC FOR PORTABLE AUDIO APPLICATIONS
Manufacturer:
WOLFSON Wolfson Microelectronics plc
Datasheet:
![WM9711](/images/no-image3.png)
Part Number:
Description:
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
![WM9705](/images/no-image3.png)
Part Number:
Description:
Manufacturer:
Wolfson Microelectronics plc
Datasheet:
![WM9707](/images/no-image3.png)
Part Number:
Description:
Manufacturer:
Wolfson Microelectronics plc
Datasheet: