WM9710

Production Data

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PD Rev 4.0 December 2003

14

DEVICE DESCRIPTION

INTRODUCTION

This specification describes the WM9710 audio codec, which is designed to be software and

hardware compatible with the Intel AC’97 rev2.2 component specification. The device is a

derivative of the basic AC’97 codec. Variable Rate Audio (VRA) is supported at rates defined in

the Intel rev2.1 or rev2.2 specification, and a SPDIF output port is provided which may optionally

be used to output the PCM DAC information to external processors.

WM9710 offers the following features:

Stereo Audio Codec with Intel specified VRA support of different audio sample rates

Optional SPDIF and I

driver support)

Headphone drive capability and optional auto detection of headset or headphone plug in

It is highly recommended that the Intel AC’97 rev2.2 specification be studied in parallel with this

document: This specification can be downloaded from the Intel web site.

The WM9710 is fully operable on 3V or 5V or mixed 3/5V supplies, and is packaged in the

industry standard 48pin TQFP package with 7mm body size.

AC’97 FEATURES

WM9710 implements the base set of AC’97 rev2.2 features, plus several enhancements:

All rev2.2 specified variable audio sample rates supported

3-D stereo enhancement feature.

Headphone support on HPOUT outputs (pins 39,41)

Primary/secondary codec operation by pin programming of CID0 pin

SPDIF audio output with rev2.2 compliant control set.

NON - AC’97 FEATURES

In addition to the AC’97 features offered, WM9710 also supports:

Headphone drive capability on MONO output, with extra signal routing switch PSEL, allowing

PHONE input to be routed to MONO output

Extra switch HPND after the mixer allowing MIX without DAC signal to be output to headphone

outputs, and so allowing DAC with no MIX to be output to LINE outputs.

I

audio DAC for multi-channel solutions. SPDIF output may be hardware enabled.

Option to route the stereo audio ADC output to the SPDIF and/or I

Auto-detect of headphones or headset plugged into the HPOUT headphone outputs, with internal

routing of microphone signal from the headphone pin to the MIC1 input.

MPM switch allowing mix of DAC + mixer output onto MONOUT and independent mix of DAC +

PHONE and/or PCBEEP onto LINEOUT or HPOUT.

Reset powerdown override – holding PWRUP/LRC (PIN 43) high in reset overrides the PR bits

forcing the WM9710 into a low power mode.