WM5102 datasheet(42/334 Pages) WOLFSON

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WM5102

Production Data

PD, June 2014, Rev 4.2

The WM5102 is cost-optimised for a wide range of mobile phone applications, and features two

channels of Class D power amplification. For applications requiring more than two channels of power

amplification (or when using the integrated Class D path to drive a haptics actuator), the PDM output

channels can be used to drive two external PDM-input speaker drivers. In applications where stereo

loudspeakers are physically widely separated, the PDM outputs can ease layout and EMC by avoiding

the need to run the Class-D speaker outputs over long distances and interconnects.

DIGITAL AUDIO CORE

The WM5102 uses a core architecture based on all-digital signal routing, making digital audio effects

available on all signal paths, regardless of whether the source data input is analogue or digital. The

digital mixing desk allows different audio effects to be applied simultaneously on many independent

paths, whilst also supporting a variety of sample rates concurrently. This helps support many new

audio use-cases. Soft mute and un-mute control allows smooth transitions between use-cases without

interrupting existing audio streams elsewhere.

The WM5102 digital core provides an extensive capability for programmable signal processing

algorithms. The DSP can support functions such as echo cancellation, wind noise, side-tone and other

programmable filters. The DSP is optimised for advanced voice processing, but a wide range of

application-specific filters and audio enhancements can also be implemented.

Highly flexible digital mixing, including mixing between audio interfaces, is possible. The WM5102

performs stereo full-duplex asynchronous sample rate conversion, providing use-case flexibility across

a broad range of system architectures. Automatic sample rate detection is provided, enabling

seamless wideband/narrowband voice call handover.

Dynamic Range Controller (DRC) functions are available for optimising audio signal levels. In

playback modes, the DRC can be used to maximise loudness, while limiting the signal level to avoid

distortion, clipping or battery droop, in particular for high-power output drivers such as speaker

amplifiers. In record modes, the DRC assists in applications where the signal level is unpredictable.

The 5-band parametric equaliser (EQ) functions can be used to compensate for the frequency

characteristics of the output transducers. EQ functions can be cascaded to provide additional

frequency control. Programmable high-pass and low-pass filters are also available for general filtering

applications such as removal of wind and other low-frequency noise.

DIGITAL INTERFACES

Three serial digital audio interfaces (AIFs) each support PCM, TDM and I2S data formats for

compatibility with most industry-standard chipsets. AIF1 supports eight input/output channels; AIF2

and AIF3 each support two input/output channels. Bidirectional operation at sample rates up to

192kHz is supported.

Six digital PDM input channels are available (three stereo interfaces); these are typically used for

digital microphones, powered from the integrated MICBIAS power supply regulators. Two PDM output

channels are also available (one stereo interface); these are typically used for external power

amplifiers. Embedded mute codes provide a control mechanism for external PDM-input devices.

The WM5102 features a MIPI-compliant SLIMbus interface, providing eight channels of audio

input/output. Mixed audio sample rates are supported on the SLIMbus interface. The SLIMbus

interface also supports read/write access to the WM5102 control registers.

The WM5102 is equipped with an I2C slave port (at up to 1MHz), and an SPI port (at up to 26MHz).

Full access to the register map is also provided via the SLIMbus port.

WM5102 Datasheet(PDF) 42 Page - Wolfson Microelectronics plc

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