wm9713 Wolfson Microelectronics plc, wm9713 Datasheet

wm9713

Manufacturer Part Number

wm9713

Description

Ac?97 Audio + Touchpanel Codec

Manufacturer

Wolfson Microelectronics plc

Datasheet

1.WM9713.pdf (132 pages)

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DESCRIPTION

The WM9713L is a highly integrated input/output device

designed for mobile computing and communications.

The chip is architected for dual CODEC operation, supporting

Hi-Fi stereo Codec functions via the AC link interface, and

additionally supporting voice Codec functions via a PCM type

Synchronous Serial Port (SSP). A third, auxiliary DAC is

provided which may be used to support generation of

supervisory tones, or ring-tones at different sample rates to the

main codec.

The device can connect directly to a 4-wire or 5-wire touch-

panel, mono or stereo microphones, stereo headphones and a

stereo speaker, reducing total component count in the system.

Cap-less connections to the headphones, speakers, and

earpiece may be used, saving cost and board area. Additionally,

multiple analog input and output pins are provided for seamless

integration with analog connected wireless communication

devices.

All device functions are accessed and controlled through a

single AC-Link interface compliant with the AC’97 standard.

The 24.576MHz masterclock can be input directly or generated

internally from a 13MHz (or other frequency) clock by an on-chip

PLL.

2.048MHz to 78.6MHz.

The WM9713L operates at supply voltages from 1.8V to 3.6V.

Each section of the chip can be powered down under software

control to save power. The device is available in a small

leadless 7x7mm QFN package, ideal for use in hand-held

portable systems.

BLOCK DIAGRAM

WOLFSON MICROELECTRONICS plc

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The PLL supports a wide range of input clock from

AC’97 Audio + Touchpanel CODEC

http://www.wolfsonmicro.com/enews/

FEATURES

• AC’97 Rev 2.2 compatible stereo codec

• On-chip 45mW headphone driver

• On-chip 400mW mono or stereo speaker drivers

• Stereo, mono or differential microphone input

• Auxiliary mono DAC (ring tone or DC level generation)

• Seamless interface to wireless chipset

• Resistive touchpanel interface

• Additional PCM/I

• PLL derived audio clocks.

• Supports input clock ranging from 2.048MHz to 78.6MHz

• 1.8V to 3.6V supplies (digital down to 1.62V, speaker up to

• 7x7mm 48-lead QFN package

APPLICATIONS

• Smartphones

• Personal Digital Assistants (PDA)

• Handheld and Tablet Computers

- DAC SNR 94dB, THD –85dB

- ADC SNR 87dB, THD –86dB

- Variable Rate Audio, supports all WinCE sample rates

- Tone Control, Bass Boost and 3D Enhancement

- Automatic Level Control (ALC)

- Mic insert and mic button press detection

- Supports 4-wire and 5-wire panels

- 12-bit resolution, INL ±2 LSBs (<0.5 pixels)

- X, Y and touch-pressure (Z) measurement

- Pen-down detection supported in Sleep Mode

4.2V)

S interface to support voice CODEC

Pre-Production, September 2008, Rev 3.2

WM9713L

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