WM8983GEFLSLASHV datasheet(29/124 Pages) WOLFSON

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Production Data

WM8983

PD, Rev 4.3, May 2010

OUT3 and OUT4 can be configured to provide an additional stereo or mono differential lineout from

the output of the DACs, the mixers or the input microphone boost stages. They can also provide a

midrail reference for pseudo differential inputs to external amplifiers.

AUDIO INTERFACES

The WM8983 has a standard audio interface, to support the transmission of stereo data to and from

the chip. This interface is a 3 wire standard audio interface which supports a number of audio data

formats including:

•

DSP/PCM Mode (a burst mode in which LRC sync plus 2 data packed words are

transmitted)

•

MSB-First, left justified

•

MSB-First, right justified

The interface can operate in master or slave modes.

CONTROL INTERFACES

To allow full software control over all features, the WM8983 offers a choice of 2 or 3 wire control

interface. It is fully compatible and an ideal partner for a wide range of industry standard

microprocessors, controllers and DSPs.

Selection of the mode is via the MODE pin. In 2 wire mode, the address of the device is fixed as

0011010.

CLOCKING SCHEMES

WM8983 offers the normal audio DAC clocking scheme operation, where 256fs MCLK is provided to

the DAC and ADC.

A PLL is included which may be used to generate these clocks in the event that they are not available

from the system controller. This PLL can accept a range of common input clock frequencies between

8MHz and 50MHz to generate high quality audio clocks. If this PLL is not required for generation of

these clocks, it can be reconfigured to generate alternative clocks which may then be output on the

GPIO pins and used elsewhere in the system.

POWER CONTROL

The design of the WM8983 has given much attention to power consumption without compromising

performance. It operates at very low voltages, includes the ability to power off any unused parts of the

circuitry under software control, and includes standby and power off modes.

AUXILIARY ANALOG INPUT SUPPORT

Additional stereo analog signals might be connected to the Line inputs of WM8983 (e.g. melody chip

or FM radio), and the stereo signal listened to via headphones, or recorded, simultaneously if

required.

WM8983GEFL/V датащи(PDF) 29 Page - Wolfson Microelectronics plc