WM8959 datasheet(76/155 Pages) WOLFSON

Part #	WM8959

Description	Mobile Multimedia DAC with Dual-Mode Class AB/D Speaker Driver

PDF	155 Pages

Scroll/Zoom	100%

Manufacturer	WOLFSON [Wolfson Microelectronics plc]

Direct Link	http://www.wolfsonmicro.com

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76 / 155 page

WM8959

Pre-Production

PP, May 2008, Rev 3.1

ALTERNATIVE DAC INTERFACE

The WM8959 may be configured to select between two different audio interfaces, providing the

capability to receive DAC input data via BCLK2, DACLRC2 and DACDAT2 instead of BCLK,

DACLRC and DACDAT. This selection is made by register bit AIF_SEL, as described in Table 37.

To use the alternative DAC interface, the following register settings are required:

•

AIF_TRIS = 0

•

AIF_SEL = 1

•

GPIO3_PU = 0, GPIO4_PU = 0, GPIO5_PU = 0

•

GPIO3_PD = 0, GPIO4_PD = 0, GPIO5_PD = 0

Note that additional devices can also be connected to the main interface pins using the TDM mode.

See "Digital Audio Interface" section for further details on controlling the audio interface pins.

The alternative DAC interface connection is illustrated in Figure 41.

DIGITAL AUDIO

INTERFACE

A-law and u-law support

TDM Support

GPIO

Alternative DAC Interface

Button Control / Accessory Detect

Clock Output

Processor #2

Processor #1

AIF_SEL

Figure 41 Alternative DAC Interface

WM8959 Datasheet(PDF) 76 Page - Wolfson Microelectronics plc