WM8581 datasheet(47/100 Pages) WOLFSON

Part #	WM8581

Description	Multichannel CODEC with S/PDIF Transceiver

PDF	100 Pages

Scroll/Zoom	100%

Manufacturer	WOLFSON [Wolfson Microelectronics plc]

Direct Link	http://www.wolfsonmicro.com

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47 / 100 page

Production Data

WM8581

PD Rev 4.0 April 2007

PRIMARY AUDIO INTERFACE TRANSMITTER (PAIF TX)

The PAIF Transmitter requires a left-right-clock (LRCLK) and a bit-clock (BCLK). These can be

supplied externally (slave mode) or they can be generated internally by the WM8581 (master mode).

The master mode LRCLK/BCLK are created by the Master Mode Clock Gen module. The control of

this module is described on page 34. The clock supplied to this module can be ADCMCLK,

PLLACLK, PLLBCLK, or MCLK and is selected by the internal signal paiftxms_clksel’. If the PAIF

Transmitter is sourcing the S/PDIF Receiver, it is recommended that the interface operate in master

mode. For this path, paiftxms_clksel selects PLLACLK. For all other digital routing options,

paiftxms_clksel

automatically selects whichever clock the adc_clk is using.

If in slave mode, and adc_clk is set to be MCLK, then the PAIFRX_BCLK is used as the BCLK for

the PAIF Transmitter.

Figure 30 PAIF Transmitter Clock Selection

WM8581 Datasheet(PDF) 47 Page - Wolfson Microelectronics plc